diff --git a/intern/cycles/util/util_math.h b/intern/cycles/util/util_math.h
index 0d27ee06fa7..348e652eadd 100644
--- a/intern/cycles/util/util_math.h
+++ b/intern/cycles/util/util_math.h
@@ -224,7 +224,7 @@ ccl_device_inline bool isfinite_safe(float f)
 {
 	/* By IEEE 754 rule, 2*Inf equals Inf */
 	unsigned int x = __float_as_uint(f);
-	return (f == f) && (x == 0 || (f != 2.0f*f)) && !((x << 1) > 0xff000000u);
+	return (f == f) && (x == 0 || x == (1 << 31) || (f != 2.0f*f)) && !((x << 1) > 0xff000000u);
 }
 
 ccl_device_inline float ensure_finite(float v)
diff --git a/release/text/copyright.txt b/release/text/copyright.txt
index 207d6f54ea8..d0490b9ca91 100644
--- a/release/text/copyright.txt
+++ b/release/text/copyright.txt
@@ -21,7 +21,7 @@
   Subject to the provisions of the GNU GPL license, BF grants You a
   non-exclusive right to use the Software at any computer You own or use. 
   Artwork you create with the Software - whether it is images, movies, 
-  scripts, exported 3d files or the .blend files themselves - is your sole 
+  exported 3d files or the .blend files themselves - is your sole 
   property, and can be licensed or sold under any conditions you prefer. 
 
   2. Permitted copying and electronic distribution of Software
diff --git a/source/blender/editors/space_view3d/view3d_draw.c b/source/blender/editors/space_view3d/view3d_draw.c
index c85cf689068..688bee4760b 100644
--- a/source/blender/editors/space_view3d/view3d_draw.c
+++ b/source/blender/editors/space_view3d/view3d_draw.c
@@ -703,6 +703,7 @@ void ED_view3d_draw_depth(
         const EvaluationContext *eval_ctx, struct Depsgraph *graph,
         ARegion *ar, View3D *v3d, bool alphaoverride)
 {
+	struct bThemeState theme_state;
 	Scene *scene = DEG_get_evaluated_scene(graph);
 	RegionView3D *rv3d = ar->regiondata;
 
@@ -716,6 +717,10 @@ void ED_view3d_draw_depth(
 	U.glalphaclip = alphaoverride ? 0.5f : glalphaclip; /* not that nice but means we wont zoom into billboards */
 	U.obcenter_dia = 0;
 
+	/* Tools may request depth outside of regular drawing code. */
+	UI_Theme_Store(&theme_state);
+	UI_SetTheme(SPACE_VIEW3D, RGN_TYPE_WINDOW);
+
 	ED_view3d_draw_setup_view(NULL, eval_ctx, scene, ar, v3d, NULL, NULL, NULL);
 
 	glClear(GL_DEPTH_BUFFER_BIT);
@@ -751,6 +756,8 @@ void ED_view3d_draw_depth(
 	U.glalphaclip = glalphaclip;
 	v3d->flag = flag;
 	U.obcenter_dia = obcenter_dia;
+
+	UI_Theme_Restore(&theme_state);
 }
 
 /* ******************** background plates ***************** */
diff --git a/source/blender/python/bmesh/bmesh_py_types.c b/source/blender/python/bmesh/bmesh_py_types.c
index cf5aecc40f3..9b1cd93093b 100644
--- a/source/blender/python/bmesh/bmesh_py_types.c
+++ b/source/blender/python/bmesh/bmesh_py_types.c
@@ -135,7 +135,7 @@ static int bpy_bm_elem_hflag_set(BPy_BMElem *self, PyObject *value, void *flag)
 	else {
 		BM_elem_flag_set(self->ele, hflag, param);
 	}
-	return -1;
+	return 0;
 }
 
 PyDoc_STRVAR(bpy_bm_elem_index_doc,
diff --git a/source/blender/windowmanager/intern/wm.c b/source/blender/windowmanager/intern/wm.c
index 6da6d1df348..e953f0c1712 100644
--- a/source/blender/windowmanager/intern/wm.c
+++ b/source/blender/windowmanager/intern/wm.c
@@ -497,6 +497,10 @@ void wm_close_and_free_all(bContext *C, ListBase *wmlist)
 
 void WM_main(bContext *C)
 {
+	/* Single refresh before handling events.
+	 * This ensures we don't run operators before the depsgraph has been evaluated. */
+	wm_event_do_refresh_wm_and_depsgraph(C);
+
 	while (1) {
 		
 		/* get events from ghost, handle window events, add to window queues */
diff --git a/source/blender/windowmanager/intern/wm_event_system.c b/source/blender/windowmanager/intern/wm_event_system.c
index 244f833e6b3..f3864f7ed97 100644
--- a/source/blender/windowmanager/intern/wm_event_system.c
+++ b/source/blender/windowmanager/intern/wm_event_system.c
@@ -264,13 +264,61 @@ static void wm_notifier_clear(wmNotifier *note)
 	memset(((char *)note) + sizeof(Link), 0, sizeof(*note) - sizeof(Link));
 }
 
+/**
+ * Was part of #wm_event_do_notifiers, split out so it can be called once before entering the #WM_main loop.
+ * This ensures operators don't run before the UI and depsgraph are initialized.
+ */
+void wm_event_do_refresh_wm_and_depsgraph(bContext *C)
+{
+	wmWindowManager *wm = CTX_wm_manager(C);
+	uint64_t win_combine_v3d_datamask = 0;
+
+	/* combine datamasks so 1 win doesn't disable UV's in another [#26448] */
+	for (wmWindow *win = wm->windows.first; win; win = win->next) {
+		const Scene *scene = WM_window_get_active_scene(win);
+		const bScreen *screen = WM_window_get_active_screen(win);
+
+		win_combine_v3d_datamask |= ED_view3d_screen_datamask(scene, screen);
+	}
+
+	/* cached: editor refresh callbacks now, they get context */
+	for (wmWindow *win = wm->windows.first; win; win = win->next) {
+		const bScreen *screen = WM_window_get_active_screen(win);
+		Scene *scene = WM_window_get_active_scene(win);
+		ScrArea *sa;
+
+		CTX_wm_window_set(C, win);
+		for (sa = screen->areabase.first; sa; sa = sa->next) {
+			if (sa->do_refresh) {
+				CTX_wm_area_set(C, sa);
+				ED_area_do_refresh(C, sa);
+			}
+		}
+
+		/* XXX make lock in future, or separated derivedmesh users in scene */
+		if (G.is_rendering == false) {
+			/* depsgraph & animation: update tagged datablocks */
+			Main *bmain = CTX_data_main(C);
+
+			/* copied to set's in scene_update_tagged_recursive() */
+			scene->customdata_mask = win_combine_v3d_datamask;
+
+			/* XXX, hack so operators can enforce datamasks [#26482], gl render */
+			scene->customdata_mask |= scene->customdata_mask_modal;
+
+			BKE_scene_update_tagged(bmain->eval_ctx, bmain, scene);
+		}
+	}
+
+	CTX_wm_window_set(C, NULL);
+}
+
 /* called in mainloop */
 void wm_event_do_notifiers(bContext *C)
 {
 	wmWindowManager *wm = CTX_wm_manager(C);
 	wmNotifier *note, *next;
 	wmWindow *win;
-	uint64_t win_combine_v3d_datamask = 0;
 	
 	if (wm == NULL)
 		return;
@@ -397,44 +445,7 @@ void wm_event_do_notifiers(bContext *C)
 		MEM_freeN(note);
 	}
 
-	/* combine datamasks so 1 win doesn't disable UV's in another [#26448] */
-	for (win = wm->windows.first; win; win = win->next) {
-		const Scene *scene = WM_window_get_active_scene(win);
-		const bScreen *screen = WM_window_get_active_screen(win);
-
-		win_combine_v3d_datamask |= ED_view3d_screen_datamask(scene, screen);
-	}
-
-	/* cached: editor refresh callbacks now, they get context */
-	for (win = wm->windows.first; win; win = win->next) {
-		const bScreen *screen = WM_window_get_active_screen(win);
-		Scene *scene = WM_window_get_active_scene(win);
-		ScrArea *sa;
-		
-		CTX_wm_window_set(C, win);
-		for (sa = screen->areabase.first; sa; sa = sa->next) {
-			if (sa->do_refresh) {
-				CTX_wm_area_set(C, sa);
-				ED_area_do_refresh(C, sa);
-			}
-		}
-		
-		/* XXX make lock in future, or separated derivedmesh users in scene */
-		if (G.is_rendering == false) {
-			/* depsgraph & animation: update tagged datablocks */
-			Main *bmain = CTX_data_main(C);
-
-			/* copied to set's in scene_update_tagged_recursive() */
-			scene->customdata_mask = win_combine_v3d_datamask;
-
-			/* XXX, hack so operators can enforce datamasks [#26482], gl render */
-			scene->customdata_mask |= scene->customdata_mask_modal;
-
-			BKE_scene_update_tagged(bmain->eval_ctx, bmain, scene);
-		}
-	}
-
-	CTX_wm_window_set(C, NULL);
+	wm_event_do_refresh_wm_and_depsgraph(C);
 }
 
 static int wm_event_always_pass(const wmEvent *event)
diff --git a/source/blender/windowmanager/wm_event_system.h b/source/blender/windowmanager/wm_event_system.h
index abab7c55f44..af72a1542f2 100644
--- a/source/blender/windowmanager/wm_event_system.h
+++ b/source/blender/windowmanager/wm_event_system.h
@@ -88,7 +88,8 @@ void        wm_event_do_handlers    (bContext *C);
 
 void        wm_event_add_ghostevent (wmWindowManager *wm, wmWindow *win, int type, int time, void *customdata);
 
-void        wm_event_do_notifiers   (bContext *C);
+void        wm_event_do_refresh_wm_and_depsgraph(bContext *C);
+void        wm_event_do_notifiers(bContext *C);
 
 /* wm_keymap.c */