Do not call g_object_notify() when property didn't change

78 files changed, 625 insertions, 22 deletions

diff --git a/addressbook/gui/contact-list-editor/e-contact-list-editor.c b/addressbook/gui/contact-list-editor/e-contact-list-editor.c
index fe61ccaa9e..4bb92a351d 100644
--- a/addressbook/gui/contact-list-editor/e-contact-list-editor.c
+++ b/addressbook/gui/contact-list-editor/e-contact-list-editor.c
@@ -1687,6 +1687,9 @@ e_contact_list_editor_set_client (EContactListEditor *editor,
 	g_return_if_fail (E_IS_CONTACT_LIST_EDITOR (editor));
 	g_return_if_fail (E_IS_BOOK_CLIENT (book_client));
 
+	if (book_client == editor->priv->book_client)
+		return;
+
 	if (editor->priv->book_client != NULL)
 		g_object_unref (editor->priv->book_client);
 	editor->priv->book_client = g_object_ref (book_client);
@@ -1888,6 +1891,9 @@ e_contact_list_editor_set_is_new_list (EContactListEditor *editor,
 
 	g_return_if_fail (E_IS_CONTACT_LIST_EDITOR (editor));
 
+	if ((editor->priv->is_new_list ? 1 : 0) == (is_new_list ? 1 : 0))
+		return;
+
 	editor->priv->is_new_list = is_new_list;
 	contact_list_editor_update (editor);
 
@@ -1908,6 +1914,9 @@ e_contact_list_editor_set_editable (EContactListEditor *editor,
 {
 	g_return_if_fail (E_IS_CONTACT_LIST_EDITOR (editor));
 
+	if ((editor->priv->editable ? 1 : 0) == (editable ? 1 : 0))
+		return;
+
 	editor->priv->editable = editable;
 	contact_list_editor_update (editor);
 
diff --git a/addressbook/gui/widgets/e-addressbook-model.c b/addressbook/gui/widgets/e-addressbook-model.c
index 3cc02dff54..a842ff40e0 100644
--- a/addressbook/gui/widgets/e-addressbook-model.c
+++ b/addressbook/gui/widgets/e-addressbook-model.c
@@ -889,6 +889,9 @@ e_addressbook_model_set_client (EAddressbookModel *model,
 	g_return_if_fail (E_IS_ADDRESSBOOK_MODEL (model));
 	g_return_if_fail (E_IS_BOOK_CLIENT (book_client));
 
+	if (model->priv->book_client == book_client)
+		return;
+
 	if (model->priv->book_client != NULL) {
 		if (model->priv->book_client == book_client)
 			return;
diff --git a/addressbook/gui/widgets/e-addressbook-selector.c b/addressbook/gui/widgets/e-addressbook-selector.c
index 80595ef59b..513da877bc 100644
--- a/addressbook/gui/widgets/e-addressbook-selector.c
+++ b/addressbook/gui/widgets/e-addressbook-selector.c
@@ -420,6 +420,9 @@ e_addressbook_selector_set_current_view (EAddressbookSelector *selector,
 	if (current_view != NULL)
 		g_return_if_fail (E_IS_ADDRESSBOOK_VIEW (current_view));
 
+	if (selector->priv->current_view == current_view)
+		return;
+
 	if (selector->priv->current_view != NULL) {
 		g_object_unref (selector->priv->current_view);
 		selector->priv->current_view = NULL;
diff --git a/addressbook/gui/widgets/eab-contact-display.c b/addressbook/gui/widgets/eab-contact-display.c
index 28fd5b02be..f877821593 100644
--- a/addressbook/gui/widgets/eab-contact-display.c
+++ b/addressbook/gui/widgets/eab-contact-display.c
@@ -577,6 +577,9 @@ eab_contact_display_set_contact (EABContactDisplay *display,
 {
 	g_return_if_fail (EAB_IS_CONTACT_DISPLAY (display));
 
+	if (display->priv->contact == contact)
+		return;
+
 	if (contact != NULL)
 		g_object_ref (contact);
 
diff --git a/calendar/gui/dialogs/comp-editor-page.c b/calendar/gui/dialogs/comp-editor-page.c
index 2f4e942bf1..e24bca5c1e 100644
--- a/calendar/gui/dialogs/comp-editor-page.c
+++ b/calendar/gui/dialogs/comp-editor-page.c
@@ -224,6 +224,9 @@ comp_editor_page_set_updating (CompEditorPage *page,
 {
 	g_return_if_fail (IS_COMP_EDITOR_PAGE (page));
 
+	if ((page->priv->updating ? 1 : 0) == (updating ? 1 : 0))
+		return;
+
 	page->priv->updating = updating;
 
 	g_object_notify (G_OBJECT (page), "updating");
diff --git a/calendar/gui/dialogs/comp-editor.c b/calendar/gui/dialogs/comp-editor.c
index 027146753c..8d840cbc99 100644
--- a/calendar/gui/dialogs/comp-editor.c
+++ b/calendar/gui/dialogs/comp-editor.c
@@ -2441,6 +2441,9 @@ comp_editor_set_summary (CompEditor *editor,
 
 	g_return_if_fail (IS_COMP_EDITOR (editor));
 
+	if (g_strcmp0 (editor->priv->summary, summary) == 0)
+		return;
+
 	g_free (editor->priv->summary);
 	editor->priv->summary = g_strdup (summary);
 
@@ -2485,6 +2488,9 @@ comp_editor_set_timezone (CompEditor *editor,
 {
 	g_return_if_fail (IS_COMP_EDITOR (editor));
 
+	if (editor->priv->zone == zone)
+		return;
+
 	editor->priv->zone = zone;
 
 	g_object_notify (G_OBJECT (editor), "timezone");
@@ -2504,6 +2510,9 @@ comp_editor_set_use_24_hour_format (CompEditor *editor,
 {
 	g_return_if_fail (IS_COMP_EDITOR (editor));
 
+	if ((editor->priv->use_24_hour_format ? 1 : 0) == (use_24_hour_format ? 1 : 0))
+		return;
+
 	editor->priv->use_24_hour_format = use_24_hour_format;
 
 	g_object_notify (G_OBJECT (editor), "use-24-hour-format");
@@ -2523,6 +2532,9 @@ comp_editor_set_work_day_end_hour (CompEditor *editor,
 {
 	g_return_if_fail (IS_COMP_EDITOR (editor));
 
+	if (editor->priv->work_day_end_hour == work_day_end_hour)
+		return;
+
 	editor->priv->work_day_end_hour = work_day_end_hour;
 
 	g_object_notify (G_OBJECT (editor), "work-day-end-hour");
@@ -2542,6 +2554,9 @@ comp_editor_set_work_day_end_minute (CompEditor *editor,
 {
 	g_return_if_fail (IS_COMP_EDITOR (editor));
 
+	if (editor->priv->work_day_end_minute == work_day_end_minute)
+		return;
+
 	editor->priv->work_day_end_minute = work_day_end_minute;
 
 	g_object_notify (G_OBJECT (editor), "work-day-end-minute");
@@ -2561,6 +2576,9 @@ comp_editor_set_work_day_start_hour (CompEditor *editor,
 {
 	g_return_if_fail (IS_COMP_EDITOR (editor));
 
+	if (editor->priv->work_day_start_hour == work_day_start_hour)
+		return;
+
 	editor->priv->work_day_start_hour = work_day_start_hour;
 
 	g_object_notify (G_OBJECT (editor), "work-day-start-hour");
@@ -2580,6 +2598,9 @@ comp_editor_set_work_day_start_minute (CompEditor *editor,
 {
 	g_return_if_fail (IS_COMP_EDITOR (editor));
 
+	if (editor->priv->work_day_start_minute == work_day_start_minute)
+		return;
+
 	editor->priv->work_day_start_minute = work_day_start_minute;
 
 	g_object_notify (G_OBJECT (editor), "work-day-start-minute");
@@ -2601,6 +2622,9 @@ comp_editor_set_changed (CompEditor *editor,
 
 	g_return_if_fail (IS_COMP_EDITOR (editor));
 
+	if ((editor->priv->changed ? 1 : 0) == (changed ? 1 : 0))
+		return;
+
 	editor->priv->changed = changed;
 
 	action = comp_editor_get_action (editor, "save");
@@ -2655,6 +2679,9 @@ comp_editor_set_flags (CompEditor *editor,
 {
 	g_return_if_fail (IS_COMP_EDITOR (editor));
 
+	if (editor->priv->flags == flags)
+		return;
+
 	editor->priv->flags = flags;
 	editor->priv->user_org = flags & COMP_EDITOR_USER_ORG;
 
@@ -3001,6 +3028,9 @@ comp_editor_set_client (CompEditor *editor,
 	g_return_if_fail (IS_COMP_EDITOR (editor));
 	g_return_if_fail (cal_client == NULL || E_IS_CAL_CLIENT (cal_client));
 
+	if (editor->priv->cal_client == cal_client)
+		return;
+
 	if (cal_client != NULL)
 		g_object_ref (cal_client);
 
diff --git a/calendar/gui/e-cal-model-tasks.c b/calendar/gui/e-cal-model-tasks.c
index 565f629b2c..54f95004cc 100644
--- a/calendar/gui/e-cal-model-tasks.c
+++ b/calendar/gui/e-cal-model-tasks.c
@@ -1269,6 +1269,9 @@ e_cal_model_tasks_set_color_due_today (ECalModelTasks *model,
 	g_return_if_fail (E_IS_CAL_MODEL_TASKS (model));
 	g_return_if_fail (color_due_today != NULL);
 
+	if (g_strcmp0 (model->priv->color_due_today, color_due_today) == 0)
+		return;
+
 	g_free (model->priv->color_due_today);
 	model->priv->color_due_today = g_strdup (color_due_today);
 
@@ -1312,6 +1315,9 @@ e_cal_model_tasks_set_color_overdue (ECalModelTasks *model,
 	g_return_if_fail (E_IS_CAL_MODEL_TASKS (model));
 	g_return_if_fail (color_overdue != NULL);
 
+	if (g_strcmp0 (model->priv->color_overdue, color_overdue) == 0)
+		return;
+
 	g_free (model->priv->color_overdue);
 	model->priv->color_overdue = g_strdup (color_overdue);
 
diff --git a/calendar/gui/e-cal-model.c b/calendar/gui/e-cal-model.c
index 2aaefc363d..90c411cee6 100644
--- a/calendar/gui/e-cal-model.c
+++ b/calendar/gui/e-cal-model.c
@@ -1762,6 +1762,9 @@ e_cal_model_set_confirm_delete (ECalModel *model,
 {
 	g_return_if_fail (E_IS_CAL_MODEL (model));
 
+	if ((model->priv->confirm_delete ? 1 : 0) == (confirm_delete ? 1 : 0))
+		return;
+
 	model->priv->confirm_delete = confirm_delete;
 
 	g_object_notify (G_OBJECT (model), "confirm-delete");
@@ -1855,6 +1858,9 @@ e_cal_model_set_compress_weekend (ECalModel *model,
 {
 	g_return_if_fail (E_IS_CAL_MODEL (model));
 
+	if ((model->priv->compress_weekend ? 1 : 0) == (compress_weekend ? 1 : 0))
+		return;
+
 	model->priv->compress_weekend = compress_weekend;
 
 	g_object_notify (G_OBJECT (model), "compress-weekend");
@@ -1884,6 +1890,9 @@ e_cal_model_set_default_reminder_interval (ECalModel *model,
 {
 	g_return_if_fail (E_IS_CAL_MODEL (model));
 
+	if (model->priv->default_reminder_interval == default_reminder_interval)
+		return;
+
 	model->priv->default_reminder_interval = default_reminder_interval;
 
 	g_object_notify (G_OBJECT (model), "default-reminder-interval");
@@ -1903,6 +1912,9 @@ e_cal_model_set_default_reminder_units (ECalModel *model,
 {
 	g_return_if_fail (E_IS_CAL_MODEL (model));
 
+	if (model->priv->default_reminder_units == default_reminder_units)
+		return;
+
 	model->priv->default_reminder_units = default_reminder_units;
 
 	g_object_notify (G_OBJECT (model), "default-reminder-units");
@@ -1948,6 +1960,9 @@ e_cal_model_set_use_default_reminder (ECalModel *model,
 {
 	g_return_if_fail (E_IS_CAL_MODEL (model));
 
+	if ((model->priv->use_default_reminder ? 1 : 0) == (use_default_reminder ? 1 : 0))
+		return;
+
 	model->priv->use_default_reminder = use_default_reminder;
 
 	g_object_notify (G_OBJECT (model), "use-default-reminder");
@@ -1991,6 +2006,9 @@ e_cal_model_set_work_day_end_hour (ECalModel *model,
 {
 	g_return_if_fail (E_IS_CAL_MODEL (model));
 
+	if (model->priv->work_day_end_hour == work_day_end_hour)
+		return;
+
 	model->priv->work_day_end_hour = work_day_end_hour;
 
 	g_object_notify (G_OBJECT (model), "work-day-end-hour");
@@ -2010,6 +2028,9 @@ e_cal_model_set_work_day_end_minute (ECalModel *model,
 {
 	g_return_if_fail (E_IS_CAL_MODEL (model));
 
+	if (model->priv->work_day_end_minute == work_day_end_minute)
+		return;
+
 	model->priv->work_day_end_minute = work_day_end_minute;
 
 	g_object_notify (G_OBJECT (model), "work-day-end-minute");
@@ -2029,6 +2050,9 @@ e_cal_model_set_work_day_start_hour (ECalModel *model,
 {
 	g_return_if_fail (E_IS_CAL_MODEL (model));
 
+	if (model->priv->work_day_start_hour == work_day_start_hour)
+		return;
+
 	model->priv->work_day_start_hour = work_day_start_hour;
 
 	g_object_notify (G_OBJECT (model), "work-day-start-hour");
@@ -2048,6 +2072,9 @@ e_cal_model_set_work_day_start_minute (ECalModel *model,
 {
 	g_return_if_fail (E_IS_CAL_MODEL (model));
 
+	if (model->priv->work_day_start_minute == work_day_start_minute)
+		return;
+
 	model->priv->work_day_start_minute = work_day_start_minute;
 
 	g_object_notify (G_OBJECT (model), "work-day-start-minute");
@@ -2092,6 +2119,9 @@ e_cal_model_set_default_client (ECalModel *model,
 
 	priv = model->priv;
 
+	if (priv->default_client == client)
+		return;
+
 	if (priv->default_client) {
 		client_data = find_client_data (model, priv->default_client);
 		if (!client_data) {
diff --git a/calendar/gui/e-calendar-view.c b/calendar/gui/e-calendar-view.c
index 7bab36838f..fb82854de3 100644
--- a/calendar/gui/e-calendar-view.c
+++ b/calendar/gui/e-calendar-view.c
@@ -1251,6 +1251,9 @@ e_calendar_view_set_time_divisions (ECalendarView *cal_view,
 {
 	g_return_if_fail (E_IS_CALENDAR_VIEW (cal_view));
 
+	if (cal_view->priv->time_divisions == time_divisions)
+		return;
+
 	cal_view->priv->time_divisions = time_divisions;
 
 	g_object_notify (G_OBJECT (cal_view), "time-divisions");
diff --git a/calendar/gui/e-cell-date-edit-text.c b/calendar/gui/e-cell-date-edit-text.c
index 034d715d9b..d6c2a32ca2 100644
--- a/calendar/gui/e-cell-date-edit-text.c
+++ b/calendar/gui/e-cell-date-edit-text.c
@@ -312,6 +312,9 @@ e_cell_date_edit_text_set_timezone (ECellDateEditText *ecd,
 {
 	g_return_if_fail (E_IS_CELL_DATE_EDIT_TEXT (ecd));
 
+	if (ecd->priv->timezone == timezone)
+		return;
+
 	ecd->priv->timezone = timezone;
 
 	g_object_notify (G_OBJECT (ecd), "timezone");
@@ -331,6 +334,9 @@ e_cell_date_edit_text_set_use_24_hour_format (ECellDateEditText *ecd,
 {
 	g_return_if_fail (E_IS_CELL_DATE_EDIT_TEXT (ecd));
 
+	if ((ecd->priv->use_24_hour_format ? 1 : 0) == (use_24_hour ? 1 : 0))
+		return;
+
 	ecd->priv->use_24_hour_format = use_24_hour;
 
 	g_object_notify (G_OBJECT (ecd), "use-24-hour-format");
diff --git a/calendar/gui/e-date-time-list.c b/calendar/gui/e-date-time-list.c
index 70a4578f70..4ca04a3f16 100644
--- a/calendar/gui/e-date-time-list.c
+++ b/calendar/gui/e-date-time-list.c
@@ -525,6 +525,9 @@ e_date_time_list_set_use_24_hour_format (EDateTimeList *date_time_list,
 {
 	g_return_if_fail (E_IS_DATE_TIME_LIST (date_time_list));
 
+	if ((date_time_list->use_24_hour_format ? 1 : 0) == (use_24_hour_format ? 1 : 0))
+		return;
+
 	date_time_list->use_24_hour_format = use_24_hour_format;
 
 	g_object_notify (G_OBJECT (date_time_list), "use-24-hour-format");
diff --git a/calendar/gui/e-day-view-main-item.c b/calendar/gui/e-day-view-main-item.c
index cb20ffeb4e..32021b670a 100644
--- a/calendar/gui/e-day-view-main-item.c
+++ b/calendar/gui/e-day-view-main-item.c
@@ -1277,6 +1277,9 @@ e_day_view_main_item_set_day_view (EDayViewMainItem *main_item,
 	g_return_if_fail (E_IS_DAY_VIEW_MAIN_ITEM (main_item));
 	g_return_if_fail (E_IS_DAY_VIEW (day_view));
 
+	if (main_item->priv->day_view == day_view)
+		return;
+
 	if (main_item->priv->day_view != NULL)
 		g_object_unref (main_item->priv->day_view);
 
diff --git a/calendar/gui/e-day-view-time-item.c b/calendar/gui/e-day-view-time-item.c
index 3ddc9489d1..02600d0225 100644
--- a/calendar/gui/e-day-view-time-item.c
+++ b/calendar/gui/e-day-view-time-item.c
@@ -1011,6 +1011,9 @@ e_day_view_time_item_set_day_view (EDayViewTimeItem *time_item,
 	g_return_if_fail (E_IS_DAY_VIEW_TIME_ITEM (time_item));
 	g_return_if_fail (E_IS_DAY_VIEW (day_view));
 
+	if (time_item->priv->day_view == day_view)
+		return;
+
 	if (time_item->priv->day_view != NULL)
 		g_object_unref (time_item->priv->day_view);
 
diff --git a/calendar/gui/e-day-view-top-item.c b/calendar/gui/e-day-view-top-item.c
index b5afbdf4e4..15cfc8079d 100644
--- a/calendar/gui/e-day-view-top-item.c
+++ b/calendar/gui/e-day-view-top-item.c
@@ -858,6 +858,9 @@ e_day_view_top_item_set_day_view (EDayViewTopItem *top_item,
 	g_return_if_fail (E_IS_DAY_VIEW_TOP_ITEM (top_item));
 	g_return_if_fail (E_IS_DAY_VIEW (day_view));
 
+	if (top_item->priv->day_view == day_view)
+		return;
+
 	if (top_item->priv->day_view != NULL)
 		g_object_unref (top_item->priv->day_view);
 
@@ -880,6 +883,9 @@ e_day_view_top_item_set_show_dates (EDayViewTopItem *top_item,
 {
 	g_return_if_fail (E_IS_DAY_VIEW_TOP_ITEM (top_item));
 
+	if ((top_item->priv->show_dates ? 1 : 0) == (show_dates ? 1 : 0))
+		return;
+
 	top_item->priv->show_dates = show_dates;
 
 	g_object_notify (G_OBJECT (top_item), "show-dates");
diff --git a/calendar/gui/e-day-view.c b/calendar/gui/e-day-view.c
index 4d15f03939..da77c4d51d 100644
--- a/calendar/gui/e-day-view.c
+++ b/calendar/gui/e-day-view.c
@@ -2827,6 +2827,9 @@ e_day_view_marcus_bains_set_show_line (EDayView *day_view,
 {
 	g_return_if_fail (E_IS_DAY_VIEW (day_view));
 
+	if ((day_view->marcus_bains_show_line ? 1 : 0) == (show_line ? 1 : 0))
+		return;
+
 	day_view->marcus_bains_show_line = show_line;
 
 	e_day_view_marcus_bains_update (day_view);
@@ -2848,6 +2851,9 @@ e_day_view_marcus_bains_set_day_view_color (EDayView *day_view,
 {
 	g_return_if_fail (E_IS_DAY_VIEW (day_view));
 
+	if (g_strcmp0 (day_view->marcus_bains_day_view_color, day_view_color) == 0)
+		return;
+
 	g_free (day_view->marcus_bains_day_view_color);
 	day_view->marcus_bains_day_view_color = g_strdup (day_view_color);
 
@@ -2870,6 +2876,9 @@ e_day_view_marcus_bains_set_time_bar_color (EDayView *day_view,
 {
 	g_return_if_fail (E_IS_DAY_VIEW (day_view));
 
+	if (g_strcmp0 (day_view->marcus_bains_time_bar_color, time_bar_color) == 0)
+		return;
+
 	g_free (day_view->marcus_bains_time_bar_color);
 	day_view->marcus_bains_time_bar_color = g_strdup (time_bar_color);
 
diff --git a/calendar/gui/e-meeting-store.c b/calendar/gui/e-meeting-store.c
index 6e73107b6f..6d15afc130 100644
--- a/calendar/gui/e-meeting-store.c
+++ b/calendar/gui/e-meeting-store.c
@@ -879,6 +879,9 @@ e_meeting_store_set_client (EMeetingStore *store,
 {
 	g_return_if_fail (E_IS_MEETING_STORE (store));
 
+	if (store->priv->client == client)
+		return;
+
 	if (client != NULL) {
 		g_return_if_fail (E_IS_CAL_CLIENT (client));
 		g_object_ref (client);
@@ -906,6 +909,9 @@ e_meeting_store_set_default_reminder_interval (EMeetingStore *store,
 {
 	g_return_if_fail (E_IS_MEETING_STORE (store));
 
+	if (store->priv->default_reminder_interval == default_reminder_interval)
+		return;
+
 	store->priv->default_reminder_interval = default_reminder_interval;
 
 	g_object_notify (G_OBJECT (store), "default-reminder-interval");
@@ -925,6 +931,9 @@ e_meeting_store_set_default_reminder_units (EMeetingStore *store,
 {
 	g_return_if_fail (E_IS_MEETING_STORE (store));
 
+	if (store->priv->default_reminder_units == default_reminder_units)
+		return;
+
 	store->priv->default_reminder_units = default_reminder_units;
 
 	g_object_notify (G_OBJECT (store), "default-reminder-units");
@@ -944,6 +953,9 @@ e_meeting_store_set_free_busy_template (EMeetingStore *store,
 {
 	g_return_if_fail (E_IS_MEETING_STORE (store));
 
+	if (g_strcmp0 (store->priv->fb_uri, free_busy_template) == 0)
+		return;
+
 	g_free (store->priv->fb_uri);
 	store->priv->fb_uri = g_strdup (free_busy_template);
 
@@ -964,6 +976,9 @@ e_meeting_store_set_timezone (EMeetingStore *store,
 {
 	g_return_if_fail (E_IS_MEETING_STORE (store));
 
+	if (store->priv->zone == timezone)
+		return;
+
 	store->priv->zone = timezone;
 
 	g_object_notify (G_OBJECT (store), "timezone");
@@ -983,6 +998,9 @@ e_meeting_store_set_week_start_day (EMeetingStore *store,
 {
 	g_return_if_fail (E_IS_MEETING_STORE (store));
 
+	if (store->priv->week_start_day == week_start_day)
+		return;
+
 	store->priv->week_start_day = week_start_day;
 
 	g_object_notify (G_OBJECT (store), "week-start-day");
diff --git a/calendar/gui/e-meeting-time-sel.c b/calendar/gui/e-meeting-time-sel.c
index a7a5294241..79acc1887a 100644
--- a/calendar/gui/e-meeting-time-sel.c
+++ b/calendar/gui/e-meeting-time-sel.c
@@ -1018,6 +1018,9 @@ e_meeting_time_selector_set_show_week_numbers (EMeetingTimeSelector *mts,
 {
 	g_return_if_fail (E_IS_MEETING_TIME_SELECTOR (mts));
 
+	if ((mts->priv->show_week_numbers ? 1 : 0) == (show_week_numbers ? 1 : 0))
+		return;
+
 	mts->priv->show_week_numbers = show_week_numbers;
 
 	g_object_notify (G_OBJECT (mts), "show-week-numbers");
@@ -1037,6 +1040,9 @@ e_meeting_time_selector_set_use_24_hour_format (EMeetingTimeSelector *mts,
 {
 	g_return_if_fail (E_IS_MEETING_TIME_SELECTOR (mts));
 
+	if ((mts->priv->use_24_hour_format ? 1 : 0) == (use_24_hour_format ? 1 : 0))
+		return;
+
 	mts->priv->use_24_hour_format = use_24_hour_format;
 
 	g_object_notify (G_OBJECT (mts), "use-24-hour-format");
@@ -1056,6 +1062,9 @@ e_meeting_time_selector_set_week_start_day (EMeetingTimeSelector *mts,
 {
 	g_return_if_fail (E_IS_MEETING_TIME_SELECTOR (mts));
 
+	if (mts->priv->week_start_day == week_start_day)
+		return;
+
 	mts->priv->week_start_day = week_start_day;
 
 	g_object_notify (G_OBJECT (mts), "week-start-day");
diff --git a/calendar/gui/e-timezone-entry.c b/calendar/gui/e-timezone-entry.c
index d8429b844d..41b40dcf3b 100644
--- a/calendar/gui/e-timezone-entry.c
+++ b/calendar/gui/e-timezone-entry.c
@@ -353,6 +353,9 @@ e_timezone_entry_set_timezone (ETimezoneEntry *timezone_entry,
 {
 	g_return_if_fail (E_IS_TIMEZONE_ENTRY (timezone_entry));
 
+	if (timezone_entry->priv->timezone == timezone)
+		return;
+
 	timezone_entry->priv->timezone = timezone;
 
 	timezone_entry_update_entry (timezone_entry);
diff --git a/calendar/gui/e-week-view-event-item.c b/calendar/gui/e-week-view-event-item.c
index c18ab8db57..13de066ce5 100644
--- a/calendar/gui/e-week-view-event-item.c
+++ b/calendar/gui/e-week-view-event-item.c
@@ -1192,6 +1192,9 @@ e_week_view_event_item_set_event_num (EWeekViewEventItem *event_item,
 {
 	g_return_if_fail (E_IS_WEEK_VIEW_EVENT_ITEM (event_item));
 
+	if (event_item->priv->event_num == event_num)
+		return;
+
 	event_item->priv->event_num = event_num;
 	gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (event_item));
 
@@ -1212,6 +1215,9 @@ e_week_view_event_item_set_span_num (EWeekViewEventItem *event_item,
 {
 	g_return_if_fail (E_IS_WEEK_VIEW_EVENT_ITEM (event_item));
 
+	if (event_item->priv->span_num == span_num)
+		return;
+
 	event_item->priv->span_num = span_num;
 	gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (event_item));
 
diff --git a/calendar/gui/e-week-view-main-item.c b/calendar/gui/e-week-view-main-item.c
index 06ebf68dbe..edf21ccaf6 100644
--- a/calendar/gui/e-week-view-main-item.c
+++ b/calendar/gui/e-week-view-main-item.c
@@ -477,6 +477,9 @@ e_week_view_main_item_set_week_view (EWeekViewMainItem *main_item,
 	g_return_if_fail (E_IS_WEEK_VIEW_MAIN_ITEM (main_item));
 	g_return_if_fail (E_IS_WEEK_VIEW (week_view));
 
+	if (main_item->priv->week_view == week_view)
+		return;
+
 	if (main_item->priv->week_view != NULL)
 		g_object_unref (main_item->priv->week_view);
 
diff --git a/calendar/gui/e-week-view-titles-item.c b/calendar/gui/e-week-view-titles-item.c
index 40d7391679..0ad78e9cf7 100644
--- a/calendar/gui/e-week-view-titles-item.c
+++ b/calendar/gui/e-week-view-titles-item.c
@@ -302,6 +302,9 @@ e_week_view_titles_item_set_week_view (EWeekViewTitlesItem *titles_item,
 	g_return_if_fail (E_IS_WEEK_VIEW_TITLES_ITEM (titles_item));
 	g_return_if_fail (E_IS_WEEK_VIEW (week_view));
 
+	if (titles_item->priv->week_view == week_view)
+		return;
+
 	if (titles_item->priv->week_view != NULL)
 		g_object_unref (titles_item->priv->week_view);
 
diff --git a/calendar/gui/e-week-view.c b/calendar/gui/e-week-view.c
index ae9ca7a75e..613ab9e5b9 100644
--- a/calendar/gui/e-week-view.c
+++ b/calendar/gui/e-week-view.c
@@ -2033,7 +2033,7 @@ e_week_view_set_compress_weekend (EWeekView *week_view,
 
 	g_return_if_fail (E_IS_WEEK_VIEW (week_view));
 
-	if (week_view->compress_weekend == compress_weekend)
+	if ((week_view->compress_weekend ? 1 : 0) == (compress_weekend ? 1 : 0))
 		return;
 
 	week_view->compress_weekend = compress_weekend;
@@ -2079,7 +2079,7 @@ e_week_view_set_show_event_end_times (EWeekView *week_view,
 {
 	g_return_if_fail (E_IS_WEEK_VIEW (week_view));
 
-	if (week_view->show_event_end_times == show_event_end_times)
+	if ((week_view->show_event_end_times ? 1 : 0) == (show_event_end_times ? 1 : 0))
 		return;
 
 	week_view->show_event_end_times = show_event_end_times;
diff --git a/calendar/gui/gnome-cal.c b/calendar/gui/gnome-cal.c
index 7b737b69c0..7975d2752b 100644
--- a/calendar/gui/gnome-cal.c
+++ b/calendar/gui/gnome-cal.c
@@ -1840,6 +1840,9 @@ gnome_calendar_set_view (GnomeCalendar *gcal,
 
 	g_return_if_fail (GNOME_IS_CALENDAR (gcal));
 
+	if (gcal->priv->current_view_type == view_type)
+		return;
+
 	gcal->priv->current_view_type = view_type;
 	gnome_calendar_set_range_selected (gcal, FALSE);
 
@@ -1970,6 +1973,9 @@ gnome_calendar_set_date_navigator (GnomeCalendar *gcal,
 {
 	g_return_if_fail (GNOME_IS_CALENDAR (gcal));
 
+	if (gcal->priv->date_navigator == date_navigator)
+		return;
+
 	if (date_navigator != NULL) {
 		g_return_if_fail (E_IS_CALENDAR (date_navigator));
 		g_object_ref (date_navigator);
@@ -2000,6 +2006,9 @@ gnome_calendar_set_memo_table (GnomeCalendar *gcal,
 {
 	g_return_if_fail (GNOME_IS_CALENDAR (gcal));
 
+	if (gcal->priv->memo_table == memo_table)
+		return;
+
 	if (memo_table != NULL) {
 		g_return_if_fail (E_IS_MEMO_TABLE (memo_table));
 		g_object_ref (memo_table);
@@ -2027,6 +2036,9 @@ gnome_calendar_set_task_table (GnomeCalendar *gcal,
 {
 	g_return_if_fail (GNOME_IS_CALENDAR (gcal));
 
+	if (gcal->priv->task_table == task_table)
+		return;
+
 	if (task_table != NULL) {
 		g_return_if_fail (E_IS_TASK_TABLE (task_table));
 		g_object_ref (task_table);
diff --git a/composer/e-composer-header.c b/composer/e-composer-header.c
index 5ef5e41d15..83c4afd49e 100644
--- a/composer/e-composer-header.c
+++ b/composer/e-composer-header.c
@@ -379,6 +379,9 @@ e_composer_header_set_sensitive (EComposerHeader *header,
 {
 	g_return_if_fail (E_IS_COMPOSER_HEADER (header));
 
+	if ((header->priv->sensitive ? 1 : 0) == (sensitive ? 1 : 0))
+		return;
+
 	header->priv->sensitive = sensitive;
 
 	g_object_notify (G_OBJECT (header), "sensitive");
@@ -398,6 +401,9 @@ e_composer_header_set_visible (EComposerHeader *header,
 {
 	g_return_if_fail (E_IS_COMPOSER_HEADER (header));
 
+	if ((header->priv->visible ? 1 : 0) == (visible ? 1 : 0))
+		return;
+
 	header->priv->visible = visible;
 
 	g_object_notify (G_OBJECT (header), "visible");
diff --git a/composer/e-composer-post-header.c b/composer/e-composer-post-header.c
index cc013244bc..48deadfb70 100644
--- a/composer/e-composer-post-header.c
+++ b/composer/e-composer-post-header.c
@@ -350,6 +350,9 @@ e_composer_post_header_set_mail_account (EComposerPostHeader *header,
 
 	g_return_if_fail (E_IS_COMPOSER_POST_HEADER (header));
 
+	if (header->priv->mail_account == mail_account)
+		return;
+
 	if (mail_account != NULL) {
 		g_return_if_fail (E_IS_SOURCE (mail_account));
 		g_object_ref (mail_account);
diff --git a/e-util/e-activity.c b/e-util/e-activity.c
index ae34366393..cd1c5699b2 100644
--- a/e-util/e-activity.c
+++ b/e-util/e-activity.c
@@ -394,6 +394,9 @@ e_activity_set_alert_sink (EActivity *activity,
 {
 	g_return_if_fail (E_IS_ACTIVITY (activity));
 
+	if (activity->priv->alert_sink == alert_sink)
+		return;
+
 	if (alert_sink != NULL) {
 		g_return_if_fail (E_IS_ALERT_SINK (alert_sink));
 		g_object_ref (alert_sink);
@@ -421,6 +424,9 @@ e_activity_set_cancellable (EActivity *activity,
 {
 	g_return_if_fail (E_IS_ACTIVITY (activity));
 
+	if (activity->priv->cancellable == cancellable)
+		return;
+
 	if (cancellable != NULL) {
 		g_return_if_fail (G_IS_CANCELLABLE (cancellable));
 		g_object_ref (cancellable);
@@ -459,6 +465,9 @@ e_activity_set_icon_name (EActivity *activity,
 {
 	g_return_if_fail (E_IS_ACTIVITY (activity));
 
+	if (g_strcmp0 (activity->priv->icon_name, icon_name) == 0)
+		return;
+
 	g_free (activity->priv->icon_name);
 	activity->priv->icon_name = g_strdup (icon_name);
 
@@ -479,6 +488,9 @@ e_activity_set_percent (EActivity *activity,
 {
 	g_return_if_fail (E_IS_ACTIVITY (activity));
 
+	if (activity->priv->percent == percent)
+		return;
+
 	activity->priv->percent = percent;
 
 	g_object_notify (G_OBJECT (activity), "percent");
@@ -498,6 +510,9 @@ e_activity_set_state (EActivity *activity,
 {
 	g_return_if_fail (E_IS_ACTIVITY (activity));
 
+	if (activity->priv->state == state)
+		return;
+
 	activity->priv->state = state;
 
 	g_object_notify (G_OBJECT (activity), "state");
@@ -517,6 +532,9 @@ e_activity_set_text (EActivity *activity,
 {
 	g_return_if_fail (E_IS_ACTIVITY (activity));
 
+	if (g_strcmp0 (activity->priv->text, text) == 0)
+		return;
+
 	g_free (activity->priv->text);
 	activity->priv->text = g_strdup (text);
 
diff --git a/e-util/e-ui-manager.c b/e-util/e-ui-manager.c
index 98fab98ce5..928697606a 100644
--- a/e-util/e-ui-manager.c
+++ b/e-util/e-ui-manager.c
@@ -213,6 +213,9 @@ e_ui_manager_set_express_mode (EUIManager *ui_manager,
 {
 	g_return_if_fail (E_IS_UI_MANAGER (ui_manager));
 
+	if ((ui_manager->priv->express_mode ? 1 : 0) == (express_mode ? 1 : 0))
+		return;
+
 	ui_manager->priv->express_mode = express_mode;
 
 	g_object_notify (G_OBJECT (ui_manager), "express-mode");
diff --git a/em-format/e-mail-formatter.c b/em-format/e-mail-formatter.c
index 0c8a0e7068..2bf8ac0de7 100644
--- a/em-format/e-mail-formatter.c
+++ b/em-format/e-mail-formatter.c
@@ -1200,6 +1200,10 @@ e_mail_formatter_set_mark_citations (EMailFormatter *formatter,
 {
 	g_return_if_fail (E_IS_MAIL_FORMATTER (formatter));
 
+	if (((E_MAIL_FORMATTER_GET_CLASS (formatter)->text_html_flags
+	    & CAMEL_MIME_FILTER_TOHTML_MARK_CITATION) ? 1 : 0) == (mark_citations ? 1 : 0))
+		return;
+
 	if (mark_citations)
 		E_MAIL_FORMATTER_GET_CLASS (formatter)->text_html_flags |=
 			CAMEL_MIME_FILTER_TOHTML_MARK_CITATION;
@@ -1224,6 +1228,9 @@ e_mail_formatter_set_only_local_photos (EMailFormatter *formatter,
 {
 	g_return_if_fail (E_IS_MAIL_FORMATTER (formatter));
 
+	if ((formatter->priv->only_local_photos ? 1 : 0) == (only_local_photos ? 1 : 0))
+		return;
+
 	formatter->priv->only_local_photos = only_local_photos;
 
 	g_object_notify (G_OBJECT (formatter), "only-local-photos");
@@ -1243,6 +1250,9 @@ e_mail_formatter_set_show_sender_photo (EMailFormatter *formatter,
 {
 	g_return_if_fail (E_IS_MAIL_FORMATTER (formatter));
 
+	if ((formatter->priv->show_sender_photo ? 1 : 0) == (show_sender_photo ? 1 : 0))
+		return;
+
 	formatter->priv->show_sender_photo = show_sender_photo;
 
 	g_object_notify (G_OBJECT (formatter), "show-sender-photo");
@@ -1262,6 +1272,9 @@ e_mail_formatter_set_show_real_date (EMailFormatter *formatter,
 {
 	g_return_if_fail (E_IS_MAIL_FORMATTER (formatter));
 
+	if ((formatter->priv->show_real_date ? 1 : 0) == (show_real_date ? 1 : 0))
+		return;
+
 	formatter->priv->show_real_date = show_real_date;
 
 	g_object_notify (G_OBJECT (formatter), "show-real-date");
@@ -1281,6 +1294,9 @@ e_mail_formatter_set_animate_images (EMailFormatter *formatter,
 {
 	g_return_if_fail (E_IS_MAIL_FORMATTER (formatter));
 
+	if ((formatter->priv->animate_images ? 1 : 0) == (animate_images ? 1 : 0))
+		return;
+
 	formatter->priv->animate_images = animate_images;
 
 	g_object_notify (G_OBJECT (formatter), "animate-images");
@@ -1301,6 +1317,9 @@ e_mail_formatter_set_charset (EMailFormatter *formatter,
 	g_return_if_fail (E_IS_MAIL_FORMATTER (formatter));
 	g_return_if_fail (charset && *charset);
 
+	if (g_strcmp0 (formatter->priv->charset, charset) == 0)
+		return;
+
 	if (formatter->priv->charset)
 		g_free (formatter->priv->charset);
 
@@ -1324,6 +1343,9 @@ e_mail_formatter_set_default_charset (EMailFormatter *formatter,
 	g_return_if_fail (E_IS_MAIL_FORMATTER (formatter));
 	g_return_if_fail (default_charset && *default_charset);
 
+	if (g_strcmp0 (formatter->priv->default_charset, default_charset) == 0)
+		return;
+
 	if (formatter->priv->default_charset)
 		g_free (formatter->priv->default_charset);
 
diff --git a/libevolution-utils/e-alert.c b/libevolution-utils/e-alert.c
index 7983083103..7d3b5e717f 100644
--- a/libevolution-utils/e-alert.c
+++ b/libevolution-utils/e-alert.c
@@ -782,6 +782,9 @@ e_alert_set_message_type (EAlert *alert,
 {
 	g_return_if_fail (E_IS_ALERT (alert));
 
+	if (alert->priv->message_type == message_type)
+		return;
+
 	alert->priv->message_type = message_type;
 
 	g_object_notify (G_OBJECT (alert), "message-type");
@@ -818,6 +821,9 @@ e_alert_set_primary_text (EAlert *alert,
 {
 	g_return_if_fail (E_IS_ALERT (alert));
 
+	if (g_strcmp0 (alert->priv->primary_text, primary_text) == 0)
+		return;
+
 	g_free (alert->priv->primary_text);
 	alert->priv->primary_text = g_strdup (primary_text);
 
@@ -855,6 +861,9 @@ e_alert_set_secondary_text (EAlert *alert,
 {
 	g_return_if_fail (E_IS_ALERT (alert));
 
+	if (g_strcmp0 (alert->priv->secondary_text, secondary_text) == 0)
+		return;
+
 	g_free (alert->priv->secondary_text);
 	alert->priv->secondary_text = g_strdup (secondary_text);
 
diff --git a/mail/e-mail-account-store.c b/mail/e-mail-account-store.c
index e22ed99274..c7afce32d4 100644
--- a/mail/e-mail-account-store.c
+++ b/mail/e-mail-account-store.c
@@ -1093,6 +1093,9 @@ e_mail_account_store_set_express_mode (EMailAccountStore *store,
 {
 	g_return_if_fail (E_IS_MAIL_ACCOUNT_STORE (store));
 
+	if ((store->priv->express_mode ? 1 : 0) == (express_mode ? 1 : 0))
+		return;
+
 	store->priv->express_mode = express_mode;
 
 	g_object_notify (G_OBJECT (store), "express-mode");
diff --git a/mail/e-mail-browser.c b/mail/e-mail-browser.c
index 5b89154885..936b3b520f 100644
--- a/mail/e-mail-browser.c
+++ b/mail/e-mail-browser.c
@@ -985,6 +985,9 @@ e_mail_browser_set_show_deleted (EMailBrowser *browser,
 {
 	g_return_if_fail (E_IS_MAIL_BROWSER (browser));
 
+	if ((browser->priv->show_deleted ? 1 : 0) == (show_deleted ? 1 : 0))
+		return;
+
 	browser->priv->show_deleted = show_deleted;
 
 	g_object_notify (G_OBJECT (browser), "show-deleted");
diff --git a/mail/e-mail-config-auth-check.c b/mail/e-mail-config-auth-check.c
index 22523e5af0..21e6633b76 100644
--- a/mail/e-mail-config-auth-check.c
+++ b/mail/e-mail-config-auth-check.c
@@ -438,6 +438,9 @@ e_mail_config_auth_check_set_active_mechanism (EMailConfigAuthCheck *auth_check,
 {
 	g_return_if_fail (E_IS_MAIL_CONFIG_AUTH_CHECK (auth_check));
 
+	if (g_strcmp0 (auth_check->priv->active_mechanism, active_mechanism) == 0)
+		return;
+
 	g_free (auth_check->priv->active_mechanism);
 	auth_check->priv->active_mechanism = g_strdup (active_mechanism);
 
diff --git a/mail/e-mail-config-confirm-page.c b/mail/e-mail-config-confirm-page.c
index ac3585ad08..6d276263e4 100644
--- a/mail/e-mail-config-confirm-page.c
+++ b/mail/e-mail-config-confirm-page.c
@@ -197,6 +197,9 @@ e_mail_config_confirm_page_set_text (EMailConfigConfirmPage *page,
 {
 	g_return_if_fail (E_IS_MAIL_CONFIG_CONFIRM_PAGE (page));
 
+	if (g_strcmp0 (page->priv->text, (text != NULL) ? text : "") == 0)
+		return;
+
 	g_free (page->priv->text);
 	page->priv->text = g_strdup ((text != NULL) ? text : "");
 
diff --git a/mail/e-mail-config-identity-page.c b/mail/e-mail-config-identity-page.c
index b42f0dd49f..055d449d4b 100644
--- a/mail/e-mail-config-identity-page.c
+++ b/mail/e-mail-config-identity-page.c
@@ -692,6 +692,9 @@ e_mail_config_identity_page_set_show_account_info (EMailConfigIdentityPage *page
 {
 	g_return_if_fail (E_IS_MAIL_CONFIG_IDENTITY_PAGE (page));
 
+	if ((page->priv->show_account_info ? 1 : 0) == (show_account_info ? 1 : 0))
+		return;
+
 	page->priv->show_account_info = show_account_info;
 
 	g_object_notify (G_OBJECT (page), "show-account-info");
@@ -711,6 +714,9 @@ e_mail_config_identity_page_set_show_instructions (EMailConfigIdentityPage *page
 {
 	g_return_if_fail (E_IS_MAIL_CONFIG_IDENTITY_PAGE (page));
 
+	if ((page->priv->show_instructions ? 1 : 0) == (show_instructions ? 1 : 0))
+		return;
+
 	page->priv->show_instructions = show_instructions;
 
 	g_object_notify (G_OBJECT (page), "show-instructions");
@@ -730,6 +736,9 @@ e_mail_config_identity_page_set_show_signatures (EMailConfigIdentityPage *page,
 {
 	g_return_if_fail (E_IS_MAIL_CONFIG_IDENTITY_PAGE (page));
 
+	if ((page->priv->show_signatures ? 1 : 0) == (show_signatures ? 1 : 0))
+		return;
+
 	page->priv->show_signatures = show_signatures;
 
 	g_object_notify (G_OBJECT (page), "show-signatures");
diff --git a/mail/e-mail-config-service-backend.c b/mail/e-mail-config-service-backend.c
index 49019c5fb7..c6c42ae7f5 100644
--- a/mail/e-mail-config-service-backend.c
+++ b/mail/e-mail-config-service-backend.c
@@ -297,6 +297,9 @@ e_mail_config_service_backend_set_source (EMailConfigServiceBackend *backend,
 {
 	g_return_if_fail (E_IS_MAIL_CONFIG_SERVICE_BACKEND (backend));
 
+	if (backend->priv->source == source)
+		return;
+
 	if (source != NULL) {
 		g_return_if_fail (E_IS_SOURCE (source));
 		g_object_ref (source);
@@ -324,6 +327,9 @@ e_mail_config_service_backend_set_collection (EMailConfigServiceBackend *backend
 {
 	g_return_if_fail (E_IS_MAIL_CONFIG_SERVICE_BACKEND (backend));
 
+	if (backend->priv->collection == collection)
+		return;
+
 	if (collection != NULL) {
 		g_return_if_fail (E_IS_SOURCE (collection));
 		g_object_ref (collection);
diff --git a/mail/e-mail-config-service-notebook.c b/mail/e-mail-config-service-notebook.c
index 757cd902da..0043b2c812 100644
--- a/mail/e-mail-config-service-notebook.c
+++ b/mail/e-mail-config-service-notebook.c
@@ -350,6 +350,9 @@ e_mail_config_service_notebook_set_active_backend (EMailConfigServiceNotebook *n
 {
 	g_return_if_fail (E_IS_MAIL_CONFIG_SERVICE_NOTEBOOK (notebook));
 
+	if (notebook->priv->active_backend == backend)
+		return;
+
 	if (backend != NULL) {
 		g_return_if_fail (E_IS_MAIL_CONFIG_SERVICE_BACKEND (backend));
 		g_object_ref (backend);
diff --git a/mail/e-mail-config-service-page.c b/mail/e-mail-config-service-page.c
index 5994ebc2bf..dc4eb805bf 100644
--- a/mail/e-mail-config-service-page.c
+++ b/mail/e-mail-config-service-page.c
@@ -823,6 +823,9 @@ e_mail_config_service_page_set_active_backend (EMailConfigServicePage *page,
 {
 	g_return_if_fail (E_IS_MAIL_CONFIG_SERVICE_PAGE (page));
 
+	if (page->priv->active_backend == backend)
+		return;
+
 	if (backend != NULL) {
 		g_return_if_fail (E_IS_MAIL_CONFIG_SERVICE_BACKEND (backend));
 		g_object_ref (backend);
@@ -850,6 +853,9 @@ e_mail_config_service_page_set_email_address (EMailConfigServicePage *page,
 {
 	g_return_if_fail (E_IS_MAIL_CONFIG_SERVICE_PAGE (page));
 
+	if (g_strcmp0 (page->priv->email_address, email_address) == 0)
+		return;
+
 	g_free (page->priv->email_address);
 	page->priv->email_address = g_strdup (email_address);
 
diff --git a/mail/e-mail-config-summary-page.c b/mail/e-mail-config-summary-page.c
index 03a9ed19b4..2da138ee4f 100644
--- a/mail/e-mail-config-summary-page.c
+++ b/mail/e-mail-config-summary-page.c
@@ -875,6 +875,9 @@ e_mail_config_summary_page_set_account_name (EMailConfigSummaryPage *page,
 	if (account_name == NULL)
 		account_name = "";
 
+	if (g_strcmp0 (page->priv->account_name, account_name) == 0)
+		return;
+
 	g_free (page->priv->account_name);
 	page->priv->account_name = g_strdup (account_name);
 
@@ -959,6 +962,9 @@ e_mail_config_summary_page_set_identity_source (EMailConfigSummaryPage *page,
 {
 	g_return_if_fail (E_IS_MAIL_CONFIG_SUMMARY_PAGE (page));
 
+	if (page->priv->identity_source == identity_source)
+		return;
+
 	if (identity_source != NULL) {
 		g_return_if_fail (E_IS_SOURCE (identity_source));
 		g_object_ref (identity_source);
diff --git a/mail/e-mail-config-welcome-page.c b/mail/e-mail-config-welcome-page.c
index 905c42849c..9196bb8c2f 100644
--- a/mail/e-mail-config-welcome-page.c
+++ b/mail/e-mail-config-welcome-page.c
@@ -195,6 +195,9 @@ e_mail_config_welcome_page_set_text (EMailConfigWelcomePage *page,
 {
 	g_return_if_fail (E_IS_MAIL_CONFIG_WELCOME_PAGE (page));
 
+	if (g_strcmp0 (page->priv->text, (text != NULL) ? text : "") == 0)
+		return;
+
 	g_free (page->priv->text);
 	page->priv->text = g_strdup ((text != NULL) ? text : "");
 
diff --git a/mail/e-mail-display.c b/mail/e-mail-display.c
index 1b4b284720..d3652c57c3 100644
--- a/mail/e-mail-display.c
+++ b/mail/e-mail-display.c
@@ -1575,6 +1575,9 @@ e_mail_display_set_parts_list (EMailDisplay *display,
 {
 	g_return_if_fail (E_IS_MAIL_DISPLAY (display));
 
+	if (display->priv->part_list == part_list)
+		return;
+
 	if (part_list) {
 		g_return_if_fail (E_IS_MAIL_PART_LIST (part_list));
 		g_object_ref (part_list);
@@ -1602,7 +1605,7 @@ e_mail_display_set_headers_collapsable (EMailDisplay *display,
 {
 	g_return_if_fail (E_IS_MAIL_DISPLAY (display));
 
-	if (display->priv->headers_collapsable == collapsable)
+	if ((display->priv->headers_collapsable ? 1 : 0) == (collapsable ? 1 : 0))
 		return;
 
 	display->priv->headers_collapsable = collapsable;
@@ -1628,7 +1631,7 @@ e_mail_display_set_headers_collapsed (EMailDisplay *display,
 {
 	g_return_if_fail (E_IS_MAIL_DISPLAY (display));
 
-	if (display->priv->headers_collapsed == collapsed)
+	if ((display->priv->headers_collapsed ? 1 : 0) == (collapsed ? 1 : 0))
 		return;
 
 	display->priv->headers_collapsed = collapsed;
diff --git a/mail/e-mail-junk-options.c b/mail/e-mail-junk-options.c
index e2c670c688..34793dad6a 100644
--- a/mail/e-mail-junk-options.c
+++ b/mail/e-mail-junk-options.c
@@ -356,6 +356,9 @@ e_mail_junk_options_set_session (EMailJunkOptions *options,
 {
 	g_return_if_fail (E_IS_MAIL_JUNK_OPTIONS (options));
 
+	if (options->priv->session == session)
+		return;
+
 	if (session != NULL) {
 		g_return_if_fail (E_IS_MAIL_SESSION (session));
 		g_object_ref (session);
diff --git a/mail/e-mail-label-dialog.c b/mail/e-mail-label-dialog.c
index 15222cc7b4..839cc75424 100644
--- a/mail/e-mail-label-dialog.c
+++ b/mail/e-mail-label-dialog.c
@@ -266,6 +266,9 @@ e_mail_label_dialog_set_label_name (EMailLabelDialog *dialog,
 
 	entry = GTK_ENTRY (dialog->priv->entry);
 
+	if (g_strcmp0 (gtk_entry_get_text (entry), label_name) == 0)
+		return;
+
 	gtk_entry_set_text (entry, label_name);
 
 	g_object_notify (G_OBJECT (dialog), "label-name");
diff --git a/mail/e-mail-reader.c b/mail/e-mail-reader.c
index c350b52dd3..5d1c36a0ba 100644
--- a/mail/e-mail-reader.c
+++ b/mail/e-mail-reader.c
@@ -4572,6 +4572,9 @@ e_mail_reader_set_forward_style (EMailReader *reader,
 
 	priv = E_MAIL_READER_GET_PRIVATE (reader);
 
+	if (priv->forward_style == style)
+		return;
+
 	priv->forward_style = style;
 
 	g_object_notify (G_OBJECT (reader), "forward-style");
@@ -4600,7 +4603,7 @@ e_mail_reader_set_group_by_threads (EMailReader *reader,
 
 	priv = E_MAIL_READER_GET_PRIVATE (reader);
 
-	if (group_by_threads == priv->group_by_threads)
+	if ((group_by_threads ? 1 : 0) == (priv->group_by_threads ? 1 : 0))
 		return;
 
 	priv->group_by_threads = group_by_threads;
@@ -4635,6 +4638,9 @@ e_mail_reader_set_reply_style (EMailReader *reader,
 
 	priv = E_MAIL_READER_GET_PRIVATE (reader);
 
+	if (priv->reply_style == style)
+		return;
+
 	priv->reply_style = style;
 
 	g_object_notify (G_OBJECT (reader), "reply-style");
diff --git a/mail/e-mail-tab-picker.c b/mail/e-mail-tab-picker.c
index d2267dc142..c5751ca90f 100644
--- a/mail/e-mail-tab-picker.c
+++ b/mail/e-mail-tab-picker.c
@@ -1252,7 +1252,7 @@ e_mail_tab_picker_set_preview_mode (EMailTabPicker *picker,
 
 	EMailTabPickerPrivate *priv = picker->priv;
 
-	if (priv->preview_mode == preview)
+	if ((priv->preview_mode ? 1 : 0) == (preview ? 1 : 0))
 		return;
 
 	priv->preview_mode = preview;
@@ -1333,7 +1333,7 @@ e_mail_tab_picker_enable_drop (EMailTabPicker *picker,
 {
 	EMailTabPickerPrivate *priv = picker->priv;
 
-	if (priv->drop_enabled == enable)
+	if ((priv->drop_enabled ? 1 : 0) == (enable ? 1 : 0))
 		return;
 
 	priv->drop_enabled = enable;
diff --git a/mail/e-mail-tab.c b/mail/e-mail-tab.c
index d79edf40e8..a2a80436d0 100644
--- a/mail/e-mail-tab.c
+++ b/mail/e-mail-tab.c
@@ -1459,7 +1459,7 @@ e_mail_tab_set_can_close (EMailTab *tab,
 {
 	EMailTabPrivate *priv = tab->priv;
 
-	if (priv->can_close == can_close)
+	if ((priv->can_close ? 1 : 0) == (can_close ? 1 : 0))
 		return;
 
 	priv->can_close = can_close;
@@ -1504,7 +1504,7 @@ e_mail_tab_set_docking (EMailTab *tab,
 {
 	EMailTabPrivate *priv = tab->priv;
 
-	if (priv->docking == docking)
+	if ((priv->docking ? 1 : 0) == (docking ? 1 : 0))
 		return;
 
 	priv->docking = docking;
@@ -1815,7 +1815,7 @@ e_mail_tab_set_private (EMailTab *tab,
 {
 	EMailTabPrivate *priv = tab->priv;
 
-	if (priv->private == private)
+	if ((priv->private ? 1 : 0) == (private ? 1 : 0))
 		return;
 
 	priv->private = private;
@@ -1840,7 +1840,7 @@ e_mail_tab_set_active (EMailTab *tab,
 {
 	EMailTabPrivate *priv = tab->priv;
 
-	if (priv->active == active)
+	if ((priv->active ? 1 : 0) == (active ? 1 : 0))
 		return;
 
 	priv->active = active;
diff --git a/mail/e-mail-tag-editor.c b/mail/e-mail-tag-editor.c
index 57db55a5db..da87b18320 100644
--- a/mail/e-mail-tag-editor.c
+++ b/mail/e-mail-tag-editor.c
@@ -382,7 +382,7 @@ e_mail_tag_editor_set_completed (EMailTagEditor *editor,
 {
 	g_return_if_fail (E_IS_MAIL_TAG_EDITOR (editor));
 
-	if (completed == editor->priv->completed)
+	if ((completed ? 1 : 0) == (editor->priv->completed ? 1 : 0))
 		return;
 
 	editor->priv->completed = completed;
@@ -406,6 +406,9 @@ e_mail_tag_editor_set_week_start_day (EMailTagEditor *editor,
 	g_return_if_fail (E_IS_MAIL_TAG_EDITOR (editor));
 	g_return_if_fail (week_start_day >= 0 && week_start_day < 7);
 
+	if (editor->priv->week_start_day == week_start_day)
+		return;
+
 	editor->priv->week_start_day = week_start_day;
 
 	g_object_notify (G_OBJECT (editor), "week-start-day");
@@ -425,7 +428,7 @@ e_mail_tag_editor_set_use_24_hour_format (EMailTagEditor *editor,
 {
 	g_return_if_fail (E_IS_MAIL_TAG_EDITOR (editor));
 
-	if (use_24_hour_format == editor->priv->use_24_hour_format)
+	if ((use_24_hour_format ? 1 : 0) == (editor->priv->use_24_hour_format ? 1 : 0))
 		return;
 
 	editor->priv->use_24_hour_format = use_24_hour_format;
diff --git a/mail/e-mail-view.c b/mail/e-mail-view.c
index 72884dcc4b..1410d15f4e 100644
--- a/mail/e-mail-view.c
+++ b/mail/e-mail-view.c
@@ -184,6 +184,9 @@ static void
 mail_view_set_orientation (EMailView *view,
                            GtkOrientation orientation)
 {
+	if (view->priv->orientation == orientation)
+		return;
+
 	view->priv->orientation = orientation;
 
 	g_object_notify (G_OBJECT (view), "orientation");
@@ -201,6 +204,9 @@ static void
 mail_view_set_preview_visible (EMailView *view,
                                gboolean preview_visible)
 {
+	if ((view->priv->preview_visible ? 1 : 0) == (preview_visible ? 1 : 0))
+		return;
+
 	view->priv->preview_visible = preview_visible;
 
 	g_object_notify (G_OBJECT (view), "preview-visible");
@@ -216,6 +222,9 @@ static void
 mail_view_set_show_deleted (EMailView *view,
                             gboolean show_deleted)
 {
+	if ((view->priv->show_deleted ? 1 : 0) == (show_deleted ? 1 : 0))
+		return;
+
 	view->priv->show_deleted = show_deleted;
 
 	g_object_notify (G_OBJECT (view), "show-deleted");
@@ -442,6 +451,9 @@ e_mail_view_set_previous_view (EMailView *view,
 {
 	g_return_if_fail (E_IS_MAIL_VIEW (view));
 
+	if (view->priv->previous_view == previous_view)
+		return;
+
 	if (previous_view != NULL) {
 		g_return_if_fail (E_IS_MAIL_VIEW (previous_view));
 		g_object_ref (previous_view);
diff --git a/mail/em-folder-selection-button.c b/mail/em-folder-selection-button.c
index fb4e27d83b..bcbcd722e0 100644
--- a/mail/em-folder-selection-button.c
+++ b/mail/em-folder-selection-button.c
@@ -437,6 +437,9 @@ em_folder_selection_button_set_session (EMFolderSelectionButton *button,
 {
 	g_return_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button));
 
+	if (button->priv->session == session)
+		return;
+
 	if (session != NULL) {
 		g_return_if_fail (E_IS_MAIL_SESSION (session));
 		g_object_ref (session);
@@ -464,6 +467,9 @@ em_folder_selection_button_set_caption (EMFolderSelectionButton *button,
 {
 	g_return_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button));
 
+	if (g_strcmp0 (button->priv->caption, caption) == 0)
+		return;
+
 	g_free (button->priv->caption);
 	button->priv->caption = g_strdup (caption);
 
@@ -488,6 +494,9 @@ em_folder_selection_button_set_folder_uri (EMFolderSelectionButton *button,
 	if (folder_uri != NULL && *folder_uri == '\0')
 		folder_uri = NULL;
 
+	if (g_strcmp0 (button->priv->folder_uri, folder_uri) == 0)
+		return;
+
 	g_free (button->priv->folder_uri);
 	button->priv->folder_uri = g_strdup (folder_uri);
 
@@ -510,6 +519,9 @@ em_folder_selection_button_set_store (EMFolderSelectionButton *button,
 {
 	g_return_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button));
 
+	if (button->priv->store == store)
+		return;
+
 	if (store != NULL) {
 		g_return_if_fail (CAMEL_IS_STORE (store));
 		g_object_ref (store);
@@ -537,6 +549,9 @@ em_folder_selection_button_set_title (EMFolderSelectionButton *button,
 {
 	g_return_if_fail (EM_IS_FOLDER_SELECTION_BUTTON (button));
 
+	if (g_strcmp0 (button->priv->title, title) == 0)
+		return;
+
 	g_free (button->priv->title);
 	button->priv->title = g_strdup (title);
 
diff --git a/mail/em-folder-tree-model.c b/mail/em-folder-tree-model.c
index b264beef31..f6a16d842a 100644
--- a/mail/em-folder-tree-model.c
+++ b/mail/em-folder-tree-model.c
@@ -515,6 +515,9 @@ em_folder_tree_model_set_selection (EMFolderTreeModel *model,
 	if (selection != NULL)
 		g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 
+	if (model->priv->selection == selection)
+		return;
+
 	if (model->priv->selection != NULL) {
 		g_object_weak_unref (
 			G_OBJECT (model->priv->selection), (GWeakNotify)
@@ -546,6 +549,9 @@ em_folder_tree_model_set_session (EMFolderTreeModel *model,
 {
 	g_return_if_fail (EM_IS_FOLDER_TREE_MODEL (model));
 
+	if (model->priv->session == session)
+		return;
+
 	if (session != NULL) {
 		g_return_if_fail (E_IS_MAIL_SESSION (session));
 		g_object_ref (session);
diff --git a/modules/addressbook/e-book-shell-content.c b/modules/addressbook/e-book-shell-content.c
index 05f8bd8d03..d2ce13f099 100644
--- a/modules/addressbook/e-book-shell-content.c
+++ b/modules/addressbook/e-book-shell-content.c
@@ -121,6 +121,9 @@ static void
 book_shell_content_set_orientation (EBookShellContent *book_shell_content,
                                     GtkOrientation orientation)
 {
+	if (book_shell_content->priv->orientation == orientation)
+		return;
+
 	book_shell_content->priv->orientation = orientation;
 
 	g_object_notify (G_OBJECT (book_shell_content), "orientation");
@@ -700,6 +703,9 @@ e_book_shell_content_set_preview_visible (EBookShellContent *book_shell_content,
 {
 	g_return_if_fail (E_IS_BOOK_SHELL_CONTENT (book_shell_content));
 
+	if ((book_shell_content->priv->preview_visible ? 1 : 0) == (preview_visible ? 1 : 0))
+		return;
+
 	book_shell_content->priv->preview_visible = preview_visible;
 
 	g_object_notify (G_OBJECT (book_shell_content), "preview-visible");
@@ -720,6 +726,9 @@ e_book_shell_content_set_preview_show_maps (EBookShellContent *book_shell_conten
 {
 	g_return_if_fail (E_IS_BOOK_SHELL_CONTENT (book_shell_content));
 
+	if ((book_shell_content->priv->preview_show_maps ? 1 : 0) == (show_maps ? 1 : 0))
+		return;
+
 	book_shell_content->priv->preview_show_maps = show_maps;
 
 	g_object_notify (G_OBJECT (book_shell_content), "preview-show-maps");
diff --git a/modules/bogofilter/evolution-bogofilter.c b/modules/bogofilter/evolution-bogofilter.c
index 7d00888565..203142ace4 100644
--- a/modules/bogofilter/evolution-bogofilter.c
+++ b/modules/bogofilter/evolution-bogofilter.c
@@ -257,6 +257,9 @@ static void
 bogofilter_set_convert_to_unicode (EBogofilter *extension,
                                    gboolean convert_to_unicode)
 {
+	if ((extension->convert_to_unicode ? 1 : 0) == (convert_to_unicode ? 1 : 0))
+		return;
+
 	extension->convert_to_unicode = convert_to_unicode;
 
 	g_object_notify (G_OBJECT (extension), "convert-to-unicode");
diff --git a/modules/book-config-ldap/e-source-ldap.c b/modules/book-config-ldap/e-source-ldap.c
index 88ee6bc634..a491409029 100644
--- a/modules/book-config-ldap/e-source-ldap.c
+++ b/modules/book-config-ldap/e-source-ldap.c
@@ -463,6 +463,9 @@ e_source_ldap_set_authentication (ESourceLDAP *extension,
 {
 	g_return_if_fail (E_IS_SOURCE_LDAP (extension));
 
+	if (extension->priv->authentication == authentication)
+		return;
+
 	extension->priv->authentication = authentication;
 
 	g_object_notify (G_OBJECT (extension), "authentication");
@@ -482,6 +485,9 @@ e_source_ldap_set_can_browse (ESourceLDAP *extension,
 {
 	g_return_if_fail (E_IS_SOURCE_LDAP (extension));
 
+	if ((extension->priv->can_browse ? 1 : 0) == (can_browse ? 1 : 0))
+		return;
+
 	extension->priv->can_browse = can_browse;
 
 	g_object_notify (G_OBJECT (extension), "can-browse");
@@ -518,6 +524,7 @@ e_source_ldap_set_filter (ESourceLDAP *extension,
                           const gchar *filter)
 {
 	gboolean needs_parens;
+	gchar *new_filter;
 
 	g_return_if_fail (E_IS_SOURCE_LDAP (extension));
 
@@ -528,11 +535,19 @@ e_source_ldap_set_filter (ESourceLDAP *extension,
 
 	g_mutex_lock (extension->priv->property_lock);
 
-	g_free (extension->priv->filter);
 	if (needs_parens)
-		extension->priv->filter = g_strdup_printf ("(%s)", filter);
+		new_filter = g_strdup_printf ("(%s)", filter);
 	else
-		extension->priv->filter = g_strdup (filter);
+		new_filter = g_strdup (filter);
+
+	if (g_strcmp0 (extension->priv->filter, new_filter) == 0) {
+		g_mutex_unlock (extension->priv->property_lock);
+		g_free (new_filter);
+		return;
+	}
+
+	g_free (extension->priv->filter);
+	extension->priv->filter = new_filter;
 
 	g_mutex_unlock (extension->priv->property_lock);
 
@@ -553,6 +568,9 @@ e_source_ldap_set_limit (ESourceLDAP *extension,
 {
 	g_return_if_fail (E_IS_SOURCE_LDAP (extension));
 
+	if (extension->priv->limit == limit)
+		return;
+
 	extension->priv->limit = limit;
 
 	g_object_notify (G_OBJECT (extension), "limit");
@@ -592,6 +610,11 @@ e_source_ldap_set_root_dn (ESourceLDAP *extension,
 
 	g_mutex_lock (extension->priv->property_lock);
 
+	if (g_strcmp0 (extension->priv->root_dn, root_dn) == 0) {
+		g_mutex_unlock (extension->priv->property_lock);
+		return;
+	}
+
 	g_free (extension->priv->root_dn);
 	extension->priv->root_dn = e_util_strdup_strip (root_dn);
 
@@ -614,6 +637,9 @@ e_source_ldap_set_scope (ESourceLDAP *extension,
 {
 	g_return_if_fail (E_IS_SOURCE_LDAP (extension));
 
+	if (extension->priv->scope == scope)
+		return;
+
 	extension->priv->scope = scope;
 
 	g_object_notify (G_OBJECT (extension), "scope");
@@ -633,6 +659,9 @@ e_source_ldap_set_security (ESourceLDAP *extension,
 {
 	g_return_if_fail (E_IS_SOURCE_LDAP (extension));
 
+	if (extension->priv->security == security)
+		return;
+
 	extension->priv->security = security;
 
 	g_object_notify (G_OBJECT (extension), "security");
diff --git a/modules/cal-config-contacts/e-source-contacts.c b/modules/cal-config-contacts/e-source-contacts.c
index 32ba589c71..1d2040cd72 100644
--- a/modules/cal-config-contacts/e-source-contacts.c
+++ b/modules/cal-config-contacts/e-source-contacts.c
@@ -133,6 +133,9 @@ e_source_contacts_set_include_me (ESourceContacts *extension,
 {
 	g_return_if_fail (E_IS_SOURCE_CONTACTS (extension));
 
+	if ((extension->priv->include_me ? 1 : 0) == (include_me ? 1 : 0))
+		return;
+
 	extension->priv->include_me = include_me;
 
 	g_object_notify (G_OBJECT (extension), "include-me");
diff --git a/modules/cal-config-weather/e-source-weather.c b/modules/cal-config-weather/e-source-weather.c
index 63db1bc14b..3440224173 100644
--- a/modules/cal-config-weather/e-source-weather.c
+++ b/modules/cal-config-weather/e-source-weather.c
@@ -212,12 +212,21 @@ void
 e_source_weather_set_location (ESourceWeather *extension,
                                const gchar *location)
 {
+	gchar *new_location;
+
 	g_return_if_fail (E_IS_SOURCE_WEATHER (extension));
 
 	g_mutex_lock (extension->priv->property_lock);
 
+	new_location = e_util_strdup_strip (location);
+	if (g_strcmp0 (extension->priv->location, new_location) == 0) {
+		g_mutex_unlock (extension->priv->property_lock);
+		g_free (new_location);
+		return;
+	}
+
 	g_free (extension->priv->location);
-	extension->priv->location = e_util_strdup_strip (location);
+	extension->priv->location = new_location;
 
 	g_mutex_unlock (extension->priv->property_lock);
 
@@ -238,6 +247,9 @@ e_source_weather_set_units (ESourceWeather *extension,
 {
 	g_return_if_fail (E_IS_SOURCE_WEATHER (extension));
 
+	if (extension->priv->units == units)
+		return;
+
 	extension->priv->units = units;
 
 	g_object_notify (G_OBJECT (extension), "units");
diff --git a/modules/calendar/e-calendar-preferences.c b/modules/calendar/e-calendar-preferences.c
index 8c5c2796c4..a1655fa324 100644
--- a/modules/calendar/e-calendar-preferences.c
+++ b/modules/calendar/e-calendar-preferences.c
@@ -522,7 +522,7 @@ calendar_preferences_construct (ECalendarPreferences *prefs,
 	g_signal_connect (
 		shell_settings, "notify::cal-use-system-timezone",
 		G_CALLBACK (update_system_tz_widgets), prefs);
-	g_object_notify (G_OBJECT (shell_settings), "cal-use-system-timezone");
+	update_system_tz_widgets (shell_settings, NULL, prefs);
 
 	widget = e_builder_get_widget (prefs->builder, "timezone");
 	g_object_bind_property (
diff --git a/modules/calendar/e-memo-shell-content.c b/modules/calendar/e-memo-shell-content.c
index ca1c1d8f5d..ab9f3180be 100644
--- a/modules/calendar/e-memo-shell-content.c
+++ b/modules/calendar/e-memo-shell-content.c
@@ -314,6 +314,9 @@ static void
 memo_shell_content_set_orientation (EMemoShellContent *memo_shell_content,
                                     GtkOrientation orientation)
 {
+	if (memo_shell_content->priv->orientation == orientation)
+		return;
+
 	memo_shell_content->priv->orientation = orientation;
 
 	g_object_notify (G_OBJECT (memo_shell_content), "orientation");
@@ -742,6 +745,9 @@ e_memo_shell_content_set_preview_visible (EMemoShellContent *memo_shell_content,
 {
 	g_return_if_fail (E_IS_MEMO_SHELL_CONTENT (memo_shell_content));
 
+	if ((memo_shell_content->priv->preview_visible ? 1 : 0) == (preview_visible ? 1 : 0))
+		return;
+
 	memo_shell_content->priv->preview_visible = preview_visible;
 
 	if (preview_visible && memo_shell_content->priv->preview_pane) {
diff --git a/modules/calendar/e-task-shell-content.c b/modules/calendar/e-task-shell-content.c
index 2be1153775..3fe5f68f51 100644
--- a/modules/calendar/e-task-shell-content.c
+++ b/modules/calendar/e-task-shell-content.c
@@ -314,6 +314,9 @@ static void
 task_shell_content_set_orientation (ETaskShellContent *task_shell_content,
                                     GtkOrientation orientation)
 {
+	if (task_shell_content->priv->orientation == orientation)
+		return;
+
 	task_shell_content->priv->orientation = orientation;
 
 	g_object_notify (G_OBJECT (task_shell_content), "orientation");
@@ -767,6 +770,9 @@ e_task_shell_content_set_preview_visible (ETaskShellContent *task_shell_content,
 {
 	g_return_if_fail (E_IS_TASK_SHELL_CONTENT (task_shell_content));
 
+	if ((task_shell_content->priv->preview_visible ? 1 : 0) == (preview_visible ? 1 : 0))
+		return;
+
 	task_shell_content->priv->preview_visible = preview_visible;
 
 	if (preview_visible && task_shell_content->priv->preview_pane) {
diff --git a/modules/calendar/e-task-shell-view.c b/modules/calendar/e-task-shell-view.c
index f7028f87d3..4a466b7be7 100644
--- a/modules/calendar/e-task-shell-view.c
+++ b/modules/calendar/e-task-shell-view.c
@@ -526,6 +526,9 @@ e_task_shell_view_set_confirm_purge (ETaskShellView *task_shell_view,
 {
 	g_return_if_fail (E_IS_TASK_SHELL_VIEW (task_shell_view));
 
+	if ((task_shell_view->priv->confirm_purge ? 1 : 0) == (confirm_purge ? 1 : 0))
+		return;
+
 	task_shell_view->priv->confirm_purge = confirm_purge;
 
 	g_object_notify (G_OBJECT (task_shell_view), "confirm-purge");
diff --git a/modules/itip-formatter/e-source-conflict-search.c b/modules/itip-formatter/e-source-conflict-search.c
index c2f5eb6e99..4319b572cc 100644
--- a/modules/itip-formatter/e-source-conflict-search.c
+++ b/modules/itip-formatter/e-source-conflict-search.c
@@ -144,6 +144,9 @@ e_source_conflict_search_set_include_me (ESourceConflictSearch *extension,
 {
 	g_return_if_fail (E_IS_SOURCE_CONFLICT_SEARCH (extension));
 
+	if ((extension->priv->include_me ? 1 : 0) == (include_me ? 1 : 0))
+		return;
+
 	extension->priv->include_me = include_me;
 
 	g_object_notify (G_OBJECT (extension), "include-me");
diff --git a/modules/spamassassin/evolution-spamassassin.c b/modules/spamassassin/evolution-spamassassin.c
index 275e921398..0a6330e264 100644
--- a/modules/spamassassin/evolution-spamassassin.c
+++ b/modules/spamassassin/evolution-spamassassin.c
@@ -339,6 +339,9 @@ static void
 spam_assassin_set_local_only (ESpamAssassin *extension,
                               gboolean local_only)
 {
+	if ((extension->local_only ? 1 : 0) == (local_only ? 1 : 0))
+		return;
+
 	extension->local_only = local_only;
 
 	g_object_notify (G_OBJECT (extension), "local-only");
@@ -354,6 +357,9 @@ static void
 spam_assassin_set_spamc_binary (ESpamAssassin *extension,
                                 const gchar *spamc_binary)
 {
+	if (g_strcmp0 (extension->spamc_binary, spamc_binary) == 0)
+		return;
+
 	g_free (extension->spamc_binary);
 	extension->spamc_binary = g_strdup (spamc_binary);
 
@@ -370,6 +376,9 @@ static void
 spam_assassin_set_spamd_binary (ESpamAssassin *extension,
                                 const gchar *spamd_binary)
 {
+	if (g_strcmp0 (extension->spamd_binary, spamd_binary) == 0)
+		return;
+
 	g_free (extension->spamd_binary);
 	extension->spamd_binary = g_strdup (spamd_binary);
 
@@ -386,6 +395,9 @@ static void
 spam_assassin_set_socket_path (ESpamAssassin *extension,
                                const gchar *socket_path)
 {
+	if (g_strcmp0 (extension->socket_path, socket_path) == 0)
+		return;
+
 	g_free (extension->socket_path);
 	extension->socket_path = g_strdup (socket_path);
 
@@ -402,6 +414,9 @@ static void
 spam_assassin_set_use_daemon (ESpamAssassin *extension,
                               gboolean use_daemon)
 {
+	if ((extension->use_daemon ? 1 : 0) == (use_daemon ? 1 : 0))
+		return;
+
 	extension->use_daemon = use_daemon;
 
 	g_object_notify (G_OBJECT (extension), "use-daemon");
diff --git a/shell/e-shell-searchbar.c b/shell/e-shell-searchbar.c
index 644293b2a2..9d9ad5a0cb 100644
--- a/shell/e-shell-searchbar.c
+++ b/shell/e-shell-searchbar.c
@@ -1102,6 +1102,9 @@ e_shell_searchbar_set_express_mode (EShellSearchbar *searchbar,
 {
 	g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));
 
+	if ((searchbar->priv->express_mode ? 1 : 0) == (express_mode ? 1 : 0))
+		return;
+
 	searchbar->priv->express_mode = express_mode;
 
 	/* Emit "notify" on all the properties we override. */
@@ -1139,6 +1142,9 @@ e_shell_searchbar_set_labels_visible (EShellSearchbar *searchbar,
 {
 	g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));
 
+	if ((searchbar->priv->labels_visible ? 1 : 0) == (labels_visible ? 1 : 0))
+		return;
+
 	searchbar->priv->labels_visible = labels_visible;
 
 	g_object_notify (G_OBJECT (searchbar), "labels-visible");
@@ -1162,6 +1168,9 @@ e_shell_searchbar_set_filter_visible (EShellSearchbar *searchbar,
 {
 	g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));
 
+	if ((searchbar->priv->filter_visible ? 1 : 0) == (filter_visible ? 1 : 0))
+		return;
+
 	searchbar->priv->filter_visible = filter_visible;
 
 	g_object_notify (G_OBJECT (searchbar), "filter-visible");
@@ -1189,6 +1198,9 @@ e_shell_searchbar_set_search_hint (EShellSearchbar *searchbar,
 
 	entry = GTK_ENTRY (searchbar->priv->search_entry);
 
+	if (g_strcmp0 (gtk_entry_get_placeholder_text (entry), search_hint) == 0)
+		return;
+
 	gtk_entry_set_placeholder_text (entry, search_hint);
 
 	g_object_notify (G_OBJECT (searchbar), "search-hint");
@@ -1208,6 +1220,9 @@ e_shell_searchbar_set_search_option (EShellSearchbar *searchbar,
 {
 	g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));
 
+	if (searchbar->priv->search_option == search_option)
+		return;
+
 	if (search_option != NULL) {
 		g_return_if_fail (GTK_IS_RADIO_ACTION (search_option));
 		g_object_ref (search_option);
@@ -1259,6 +1274,9 @@ e_shell_searchbar_set_search_text (EShellSearchbar *searchbar,
 	if (search_text == NULL)
 		search_text = "";
 
+	if (g_strcmp0 (gtk_entry_get_text (entry), search_text) == 0)
+		return;
+
 	gtk_entry_set_text (entry, search_text);
 
 	shell_searchbar_update_search_widgets (searchbar);
@@ -1280,6 +1298,9 @@ e_shell_searchbar_set_search_visible (EShellSearchbar *searchbar,
 {
 	g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));
 
+	if ((searchbar->priv->search_visible ? 1 : 0) == (search_visible ? 1 : 0))
+		return;
+
 	searchbar->priv->search_visible = search_visible;
 
 	g_object_notify (G_OBJECT (searchbar), "search-visible");
@@ -1321,6 +1342,9 @@ e_shell_searchbar_set_scope_visible (EShellSearchbar *searchbar,
 {
 	g_return_if_fail (E_IS_SHELL_SEARCHBAR (searchbar));
 
+	if ((searchbar->priv->scope_visible ? 1 : 0) == (scope_visible ? 1 : 0))
+		return;
+
 	searchbar->priv->scope_visible = scope_visible;
 
 	g_object_notify (G_OBJECT (searchbar), "scope-visible");
@@ -1351,6 +1375,9 @@ e_shell_searchbar_set_state_group (EShellSearchbar *searchbar,
 	if (state_group == NULL)
 		state_group = STATE_GROUP_DEFAULT;
 
+	if (g_strcmp0 (searchbar->priv->state_group, state_group) == 0)
+		return;
+
 	g_free (searchbar->priv->state_group);
 	searchbar->priv->state_group = g_strdup (state_group);
 
diff --git a/shell/e-shell-settings.c b/shell/e-shell-settings.c
index bae19f1309..6338e9886d 100644
--- a/shell/e-shell-settings.c
+++ b/shell/e-shell-settings.c
@@ -48,6 +48,60 @@ static GList *instances;
 static guint property_count;
 static gpointer parent_class;
 
+static gboolean
+shell_settings_value_equal (const GValue *v1,
+			    const GValue *v2,
+			    gboolean is_debug)
+{
+	if (!v1 || !v2)
+		return v1 == v2;
+
+	if (G_VALUE_HOLDS_STRING (v1) &&
+	    G_VALUE_HOLDS_STRING (v2)) {
+		return g_strcmp0 (g_value_get_string (v1),
+				  g_value_get_string (v2)) == 0;
+	} else if (G_VALUE_HOLDS_UCHAR (v1) &&
+		   G_VALUE_HOLDS_UCHAR (v2)) {
+		return g_value_get_uchar (v1) == g_value_get_uchar (v2);
+	} else if (G_VALUE_HOLDS_CHAR (v1) &&
+		   G_VALUE_HOLDS_CHAR (v2)) {
+		return g_value_get_schar (v1) == g_value_get_schar (v2);
+	} else if (G_VALUE_HOLDS_INT (v1) &&
+		   G_VALUE_HOLDS_INT (v2)) {
+		return g_value_get_int (v1) == g_value_get_int (v2);
+	} else if (G_VALUE_HOLDS_UINT (v1) &&
+		   G_VALUE_HOLDS_UINT (v2)) {
+		return g_value_get_uint (v1) == g_value_get_uint (v2);
+	} else if (G_VALUE_HOLDS_LONG (v1) &&
+		   G_VALUE_HOLDS_LONG (v2)) {
+		return g_value_get_long (v1) == g_value_get_long (v2);
+	} else if (G_VALUE_HOLDS_ULONG (v1) &&
+		   G_VALUE_HOLDS_ULONG (v2)) {
+		return g_value_get_ulong (v1) == g_value_get_ulong (v2);
+	} else if (G_VALUE_HOLDS_INT64 (v1) &&
+		   G_VALUE_HOLDS_INT64 (v2)) {
+		return g_value_get_int64 (v1) == g_value_get_int64 (v2);
+	} else if (G_VALUE_HOLDS_UINT64 (v1) &&
+		   G_VALUE_HOLDS_UINT64 (v2)) {
+		return g_value_get_uint64 (v1) == g_value_get_uint64 (v2);
+	} else if (G_VALUE_HOLDS_DOUBLE (v1) &&
+		   G_VALUE_HOLDS_DOUBLE (v2)) {
+		return g_value_get_double (v1) == g_value_get_double (v2);
+	} else if (G_VALUE_HOLDS_BOOLEAN (v1) &&
+		   G_VALUE_HOLDS_BOOLEAN (v2)) {
+		return (g_value_get_boolean (v1) ? 1 : 0) == (g_value_get_boolean (v2) ? 1 : 0);
+	} else if (G_VALUE_HOLDS_POINTER (v1) &&
+		   G_VALUE_HOLDS_POINTER (v2)) {
+		return g_value_get_pointer (v1) == g_value_get_pointer (v2);
+	}
+
+	if (is_debug)
+		g_debug ("%s: Cannot compare '%s' with '%s'",
+			G_STRFUNC, G_VALUE_TYPE_NAME (v1), G_VALUE_TYPE_NAME (v2));
+
+	return FALSE;
+}
+
 static GParamSpec *
 shell_settings_pspec_for_key (const gchar *property_name,
                               const gchar *schema,
@@ -151,6 +205,12 @@ shell_settings_set_property (GObject *object,
 	dest_value = &g_array_index (
 		priv->value_array, GValue, property_id - 1);
 
+	if (shell_settings_value_equal (value, dest_value, priv->debug)) {
+		if (priv->debug)
+			g_debug ("Setting '%s' set, but it didn't change", pspec->name);
+		return;
+	}
+
 	g_value_copy (value, dest_value);
 	g_object_notify (object, pspec->name);
 
diff --git a/shell/e-shell-sidebar.c b/shell/e-shell-sidebar.c
index d869a2a63a..362321069a 100644
--- a/shell/e-shell-sidebar.c
+++ b/shell/e-shell-sidebar.c
@@ -594,6 +594,9 @@ e_shell_sidebar_set_icon_name (EShellSidebar *shell_sidebar,
 {
 	g_return_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar));
 
+	if (g_strcmp0 (shell_sidebar->priv->icon_name, icon_name) == 0)
+		return;
+
 	g_free (shell_sidebar->priv->icon_name);
 	shell_sidebar->priv->icon_name = g_strdup (icon_name);
 
@@ -637,6 +640,9 @@ e_shell_sidebar_set_primary_text (EShellSidebar *shell_sidebar,
 {
 	g_return_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar));
 
+	if (g_strcmp0 (shell_sidebar->priv->primary_text, primary_text) == 0)
+		return;
+
 	g_free (shell_sidebar->priv->primary_text);
 	shell_sidebar->priv->primary_text = e_utf8_ensure_valid (primary_text);
 
@@ -683,6 +689,9 @@ e_shell_sidebar_set_secondary_text (EShellSidebar *shell_sidebar,
 {
 	g_return_if_fail (E_IS_SHELL_SIDEBAR (shell_sidebar));
 
+	if (g_strcmp0 (shell_sidebar->priv->secondary_text, secondary_text) == 0)
+		return;
+
 	g_free (shell_sidebar->priv->secondary_text);
 	shell_sidebar->priv->secondary_text = e_utf8_ensure_valid (secondary_text);
 
diff --git a/shell/e-shell-switcher.c b/shell/e-shell-switcher.c
index efbc311945..b2830cac02 100644
--- a/shell/e-shell-switcher.c
+++ b/shell/e-shell-switcher.c
@@ -773,6 +773,9 @@ e_shell_switcher_set_visible (EShellSwitcher *switcher,
 
 	g_return_if_fail (E_IS_SHELL_SWITCHER (switcher));
 
+	if ((switcher->priv->toolbar_visible ? 1 : 0) == (visible ? 1 : 0))
+		return;
+
 	switcher->priv->toolbar_visible = visible;
 
 	for (iter = switcher->priv->proxies; iter != NULL; iter = iter->next)
diff --git a/shell/e-shell-view.c b/shell/e-shell-view.c
index fdad1cbd19..06e99a8270 100644
--- a/shell/e-shell-view.c
+++ b/shell/e-shell-view.c
@@ -1367,6 +1367,9 @@ e_shell_view_set_page_num (EShellView *shell_view,
 {
 	g_return_if_fail (E_IS_SHELL_VIEW (shell_view));
 
+	if (shell_view->priv->page_num == page_num)
+		return;
+
 	shell_view->priv->page_num = page_num;
 
 	g_object_notify (G_OBJECT (shell_view), "page-num");
@@ -1440,6 +1443,9 @@ e_shell_view_set_search_rule (EShellView *shell_view,
 {
 	g_return_if_fail (E_IS_SHELL_VIEW (shell_view));
 
+	if (shell_view->priv->search_rule == search_rule)
+		return;
+
 	if (search_rule != NULL) {
 		g_return_if_fail (E_IS_FILTER_RULE (search_rule));
 		g_object_ref (search_rule);
diff --git a/shell/e-shell-window-private.c b/shell/e-shell-window-private.c
index 572fbaf4f3..a0404f9915 100644
--- a/shell/e-shell-window-private.c
+++ b/shell/e-shell-window-private.c
@@ -537,6 +537,9 @@ e_shell_window_switch_to_view (EShellWindow *shell_window,
 	g_return_if_fail (E_IS_SHELL_WINDOW (shell_window));
 	g_return_if_fail (view_name != NULL);
 
+	if (shell_window->priv->active_view == view_name)
+		return;
+
 	shell_view = e_shell_window_get_shell_view (shell_window, view_name);
 
 	shell_window->priv->active_view = view_name;
diff --git a/shell/e-shell-window.c b/shell/e-shell-window.c
index abc3d085fd..ede1400fcb 100644
--- a/shell/e-shell-window.c
+++ b/shell/e-shell-window.c
@@ -1386,6 +1386,9 @@ e_shell_window_set_safe_mode (EShellWindow *shell_window,
 {
 	g_return_if_fail (E_IS_SHELL_WINDOW (shell_window));
 
+	if ((shell_window->priv->safe_mode ? 1 : 0) == (safe_mode ? 1 : 0))
+		return;
+
 	shell_window->priv->safe_mode = safe_mode;
 
 	g_object_notify (G_OBJECT (shell_window), "safe-mode");
@@ -1449,6 +1452,9 @@ e_shell_window_set_sidebar_visible (EShellWindow *shell_window,
 {
 	g_return_if_fail (E_IS_SHELL_WINDOW (shell_window));
 
+	if ((shell_window->priv->sidebar_visible ? 1 : 0) == (sidebar_visible ? 1 : 0))
+		return;
+
 	shell_window->priv->sidebar_visible = sidebar_visible;
 
 	g_object_notify (G_OBJECT (shell_window), "sidebar-visible");
@@ -1483,6 +1489,9 @@ e_shell_window_set_switcher_visible (EShellWindow *shell_window,
 {
 	g_return_if_fail (E_IS_SHELL_WINDOW (shell_window));
 
+	if ((shell_window->priv->switcher_visible ? 1 : 0) == (switcher_visible ? 1 : 0))
+		return;
+
 	shell_window->priv->switcher_visible = switcher_visible;
 
 	g_object_notify (G_OBJECT (shell_window), "switcher-visible");
@@ -1517,6 +1526,9 @@ e_shell_window_set_taskbar_visible (EShellWindow *shell_window,
 {
 	g_return_if_fail (E_IS_SHELL_WINDOW (shell_window));
 
+	if ((shell_window->priv->taskbar_visible ? 1 : 0) == (taskbar_visible ? 1 : 0))
+		return;
+
 	shell_window->priv->taskbar_visible = taskbar_visible;
 
 	g_object_notify (G_OBJECT (shell_window), "taskbar-visible");
@@ -1551,6 +1563,9 @@ e_shell_window_set_toolbar_visible (EShellWindow *shell_window,
 {
 	g_return_if_fail (E_IS_SHELL_WINDOW (shell_window));
 
+	if ((shell_window->priv->toolbar_visible ? 1 : 0) == (toolbar_visible ? 1 : 0))
+		return;
+
 	shell_window->priv->toolbar_visible = toolbar_visible;
 
 	g_object_notify (G_OBJECT (shell_window), "toolbar-visible");
diff --git a/shell/e-shell.c b/shell/e-shell.c
index 7ab685ab27..0f11c16903 100644
--- a/shell/e-shell.c
+++ b/shell/e-shell.c
@@ -1744,7 +1744,7 @@ e_shell_set_network_available (EShell *shell,
 	if (shell->priv->network_available_locked)
 		return;
 
-	if (network_available == shell->priv->network_available)
+	if ((network_available ? 1 : 0) == (shell->priv->network_available ? 1 : 0))
 		return;
 
 	shell->priv->network_available = network_available;
diff --git a/widgets/misc/e-attachment-bar.c b/widgets/misc/e-attachment-bar.c
index d7c90df330..ed9fb02105 100644
--- a/widgets/misc/e-attachment-bar.c
+++ b/widgets/misc/e-attachment-bar.c
@@ -759,6 +759,9 @@ e_attachment_bar_set_expanded (EAttachmentBar *bar,
 {
 	g_return_if_fail (E_IS_ATTACHMENT_BAR (bar));
 
+	if ((bar->priv->expanded ? 1 : 0) == (expanded ? 1 : 0))
+		return;
+
 	bar->priv->expanded = expanded;
 
 	g_object_notify (G_OBJECT (bar), "expanded");
diff --git a/widgets/misc/e-attachment-button.c b/widgets/misc/e-attachment-button.c
index d3aa4a6350..d3fda0985a 100644
--- a/widgets/misc/e-attachment-button.c
+++ b/widgets/misc/e-attachment-button.c
@@ -834,6 +834,9 @@ e_attachment_button_set_expandable (EAttachmentButton *button,
 {
 	g_return_if_fail (E_IS_ATTACHMENT_BUTTON (button));
 
+	if ((button->priv->expandable ? 1 : 0) == (expandable ? 1 : 0))
+		return;
+
 	button->priv->expandable = expandable;
 
 	if (!expandable)
@@ -856,6 +859,9 @@ e_attachment_button_set_expanded (EAttachmentButton *button,
 {
 	g_return_if_fail (E_IS_ATTACHMENT_BUTTON (button));
 
+	if ((button->priv->expanded ? 1 : 0) == (expanded ? 1 : 0))
+		return;
+
 	button->priv->expanded = expanded;
 
 	g_object_notify (G_OBJECT (button), "expanded");
diff --git a/widgets/misc/e-attachment-paned.c b/widgets/misc/e-attachment-paned.c
index c0048fcd31..119c66e6f2 100644
--- a/widgets/misc/e-attachment-paned.c
+++ b/widgets/misc/e-attachment-paned.c
@@ -843,6 +843,9 @@ e_attachment_paned_set_expanded (EAttachmentPaned *paned,
 {
 	g_return_if_fail (E_IS_ATTACHMENT_PANED (paned));
 
+	if ((paned->priv->expanded ? 1 : 0) == (expanded ? 1 : 0))
+		return;
+
 	paned->priv->expanded = expanded;
 
 	g_object_notify (G_OBJECT (paned), "expanded");
@@ -862,6 +865,9 @@ e_attachment_paned_set_resize_toplevel (EAttachmentPaned *paned,
 {
 	g_return_if_fail (E_IS_ATTACHMENT_PANED (paned));
 
+	if ((paned->priv->resize_toplevel ? 1 : 0) == (resize_toplevel ? 1 : 0))
+		return;
+
 	paned->priv->resize_toplevel = resize_toplevel;
 
 	g_object_notify (G_OBJECT (paned), "resize-toplevel");
diff --git a/widgets/misc/e-dateedit.c b/widgets/misc/e-dateedit.c
index 38b1900e03..60b6b42d35 100644
--- a/widgets/misc/e-dateedit.c
+++ b/widgets/misc/e-dateedit.c
@@ -1050,7 +1050,7 @@ e_date_edit_set_show_date (EDateEdit *dedit,
 
 	priv = dedit->priv;
 
-	if (priv->show_date == show_date)
+	if ((priv->show_date ? 1 : 0) == (show_date ? 1 : 0))
 		return;
 
 	priv->show_date = show_date;
@@ -1107,7 +1107,7 @@ e_date_edit_set_show_time (EDateEdit *dedit,
 
 	priv = dedit->priv;
 
-	if (priv->show_time == show_time)
+	if ((priv->show_time ? 1 : 0) == (show_time ? 1 : 0))
 		return;
 
 	priv->show_time = show_time;
@@ -1250,7 +1250,7 @@ e_date_edit_set_use_24_hour_format (EDateEdit *dedit,
 {
 	g_return_if_fail (E_IS_DATE_EDIT (dedit));
 
-	if (dedit->priv->use_24_hour_format == use_24_hour_format)
+	if ((dedit->priv->use_24_hour_format ? 1 : 0) == (use_24_hour_format ? 1 : 0))
 		return;
 
 	dedit->priv->use_24_hour_format = use_24_hour_format;
@@ -1278,6 +1278,9 @@ e_date_edit_set_allow_no_date_set (EDateEdit *dedit,
 {
 	g_return_if_fail (E_IS_DATE_EDIT (dedit));
 
+	if ((dedit->priv->allow_no_date_set ? 1 : 0) == (allow_no_date_set ? 1 : 0))
+		return;
+
 	dedit->priv->allow_no_date_set = allow_no_date_set;
 
 	if (!allow_no_date_set) {
diff --git a/widgets/misc/e-mail-signature-combo-box.c b/widgets/misc/e-mail-signature-combo-box.c
index 40f0d77744..d7a7039344 100644
--- a/widgets/misc/e-mail-signature-combo-box.c
+++ b/widgets/misc/e-mail-signature-combo-box.c
@@ -381,6 +381,9 @@ e_mail_signature_combo_box_set_identity_uid (EMailSignatureComboBox *combo_box,
 
 	g_return_if_fail (E_IS_MAIL_SIGNATURE_COMBO_BOX (combo_box));
 
+	if (g_strcmp0 (combo_box->priv->identity_uid, identity_uid) == 0)
+		return;
+
 	g_free (combo_box->priv->identity_uid);
 	combo_box->priv->identity_uid = g_strdup (identity_uid);
 
diff --git a/widgets/misc/e-mail-signature-manager.c b/widgets/misc/e-mail-signature-manager.c
index 0392316756..425fbca33a 100644
--- a/widgets/misc/e-mail-signature-manager.c
+++ b/widgets/misc/e-mail-signature-manager.c
@@ -690,6 +690,9 @@ e_mail_signature_manager_set_prefer_html (EMailSignatureManager *manager,
 {
 	g_return_if_fail (E_IS_MAIL_SIGNATURE_MANAGER (manager));
 
+	if ((manager->priv->prefer_html ? 1 : 0) == (prefer_html ? 1 : 0))
+		return;
+
 	manager->priv->prefer_html = prefer_html;
 
 	g_object_notify (G_OBJECT (manager), "prefer-html");
diff --git a/widgets/misc/e-online-button.c b/widgets/misc/e-online-button.c
index 07ff998dc3..41b81f4b94 100644
--- a/widgets/misc/e-online-button.c
+++ b/widgets/misc/e-online-button.c
@@ -190,6 +190,9 @@ e_online_button_set_online (EOnlineButton *button,
 
 	g_return_if_fail (E_IS_ONLINE_BUTTON (button));
 
+	if ((button->priv->online ? 1 : 0) == (online ? 1 : 0))
+		return;
+
 	button->priv->online = online;
 
 	image = GTK_IMAGE (button->priv->image);
diff --git a/widgets/misc/e-popup-action.c b/widgets/misc/e-popup-action.c
index 2fd000ccad..f5d8445d77 100644
--- a/widgets/misc/e-popup-action.c
+++ b/widgets/misc/e-popup-action.c
@@ -139,6 +139,9 @@ popup_action_set_use_action_appearance (EPopupAction *popup_action,
 	GtkActivatable *activatable;
 	GtkAction *related_action;
 
+	if ((popup_action->priv->use_action_appearance ? 1 : 0) == (use_action_appearance ? 1 : 0))
+		return;
+
 	popup_action->priv->use_action_appearance = use_action_appearance;
 
 	g_object_notify (G_OBJECT (popup_action), "use-action-appearance");
diff --git a/widgets/misc/e-port-entry.c b/widgets/misc/e-port-entry.c
index cf857b5d55..f007731433 100644
--- a/widgets/misc/e-port-entry.c
+++ b/widgets/misc/e-port-entry.c
@@ -468,6 +468,9 @@ e_port_entry_set_security_method (EPortEntry *port_entry,
 {
 	g_return_if_fail (E_IS_PORT_ENTRY (port_entry));
 
+	if (port_entry->priv->method == method)
+		return;
+
 	port_entry->priv->method = method;
 
 	port_entry_method_changed (port_entry);
diff --git a/widgets/misc/e-web-view.c b/widgets/misc/e-web-view.c
index 9cf4f669dd..8ace48ca1d 100644
--- a/widgets/misc/e-web-view.c
+++ b/widgets/misc/e-web-view.c
@@ -2205,6 +2205,9 @@ e_web_view_set_caret_mode (EWebView *web_view,
 {
 	g_return_if_fail (E_IS_WEB_VIEW (web_view));
 
+	if ((web_view->priv->caret_mode ? 1 : 0) == (caret_mode ? 1 : 0))
+		return;
+
 	web_view->priv->caret_mode = caret_mode;
 
 	g_object_notify (G_OBJECT (web_view), "caret-mode");
@@ -2233,6 +2236,9 @@ e_web_view_set_disable_printing (EWebView *web_view,
 {
 	g_return_if_fail (E_IS_WEB_VIEW (web_view));
 
+	if ((web_view->priv->disable_printing ? 1 : 0) == (disable_printing ? 1 : 0))
+		return;
+
 	web_view->priv->disable_printing = disable_printing;
 
 	g_object_notify (G_OBJECT (web_view), "disable-printing");
@@ -2252,6 +2258,9 @@ e_web_view_set_disable_save_to_disk (EWebView *web_view,
 {
 	g_return_if_fail (E_IS_WEB_VIEW (web_view));
 
+	if ((web_view->priv->disable_save_to_disk ? 1 : 0) == (disable_save_to_disk ? 1 : 0))
+		return;
+
 	web_view->priv->disable_save_to_disk = disable_save_to_disk;
 
 	g_object_notify (G_OBJECT (web_view), "disable-save-to-disk");
@@ -2416,6 +2425,9 @@ e_web_view_set_selected_uri (EWebView *web_view,
 {
 	g_return_if_fail (E_IS_WEB_VIEW (web_view));
 
+	if (g_strcmp0 (web_view->priv->selected_uri, selected_uri) == 0)
+		return;
+
 	g_free (web_view->priv->selected_uri);
 	web_view->priv->selected_uri = g_strdup (selected_uri);
 
@@ -2436,6 +2448,9 @@ e_web_view_set_cursor_image (EWebView *web_view,
 {
 	g_return_if_fail (E_IS_WEB_VIEW (web_view));
 
+	if (web_view->priv->cursor_image == image)
+		return;
+
 	if (image != NULL)
 		g_object_ref (image);
 
@@ -2461,6 +2476,9 @@ e_web_view_set_cursor_image_src (EWebView *web_view,
 {
 	g_return_if_fail (E_IS_WEB_VIEW (web_view));
 
+	if (g_strcmp0 (web_view->priv->cursor_image_src, src_uri) == 0)
+		return;
+
 	g_free (web_view->priv->cursor_image_src);
 	web_view->priv->cursor_image_src = g_strdup (src_uri);
 
@@ -2481,6 +2499,9 @@ e_web_view_set_open_proxy (EWebView *web_view,
 {
 	g_return_if_fail (E_IS_WEB_VIEW (web_view));
 
+	if (web_view->priv->open_proxy == open_proxy)
+		return;
+
 	if (open_proxy != NULL) {
 		g_return_if_fail (GTK_IS_ACTION (open_proxy));
 		g_object_ref (open_proxy);
@@ -2517,6 +2538,9 @@ e_web_view_set_print_proxy (EWebView *web_view,
 {
 	g_return_if_fail (E_IS_WEB_VIEW (web_view));
 
+	if (web_view->priv->print_proxy == print_proxy)
+		return;
+
 	if (print_proxy != NULL) {
 		g_return_if_fail (GTK_IS_ACTION (print_proxy));
 		g_object_ref (print_proxy);
@@ -2544,6 +2568,9 @@ e_web_view_set_save_as_proxy (EWebView *web_view,
 {
 	g_return_if_fail (E_IS_WEB_VIEW (web_view));
 
+	if (web_view->priv->save_as_proxy == save_as_proxy)
+		return;
+
 	if (save_as_proxy != NULL) {
 		g_return_if_fail (GTK_IS_ACTION (save_as_proxy));
 		g_object_ref (save_as_proxy);