diff --git a/source/blender/include/BDR_editobject.h b/source/blender/include/BDR_editobject.h
index 4a175728d99..f3af74d1c24 100644
--- a/source/blender/include/BDR_editobject.h
+++ b/source/blender/include/BDR_editobject.h
@@ -108,7 +108,7 @@ void select_select_keys(void);
 int vergbaseco(const void *a1, const void *a2);
 void auto_timeoffs(void);
 void texspace_edit(void);
-void flip_subdivison(struct Object *ob, int);
+void flip_subdivison(int);
 void mirrormenu(void);
 
 
diff --git a/source/blender/src/editobject.c b/source/blender/src/editobject.c
index 63dadb6e6c1..102d77dbc07 100644
--- a/source/blender/src/editobject.c
+++ b/source/blender/src/editobject.c
@@ -2711,16 +2711,25 @@ void convertmenu(void)
 
 	/* Change subdivision properties of mesh object ob, if
 	 * level==-1 then toggle subsurf, else set to level.
+     * *set allows to toggle multiple selections
 	 */
-void flip_subdivison(Object *ob, int level)
+static void object_flip_subdivison(Object *ob, int *set, int level)
 {
-	ModifierData *md = modifiers_findByType(ob, eModifierType_Subsurf);
+	ModifierData *md;
 
+	if(ob->type!=OB_MESH)
+		return;
+	
+	md = modifiers_findByType(ob, eModifierType_Subsurf);
+	
 	if (md) {
 		SubsurfModifierData *smd = (SubsurfModifierData*) md;
 
 		if (level == -1) {
-			if (smd->modifier.mode&(eModifierMode_Render|eModifierMode_Realtime)) {
+			if(*set == -1) 
+				*set= smd->modifier.mode&(eModifierMode_Render|eModifierMode_Realtime);
+										  
+			if (*set) {
 				smd->modifier.mode &= ~(eModifierMode_Render|eModifierMode_Realtime);
 			} else {
 				smd->modifier.mode |= (eModifierMode_Render|eModifierMode_Realtime);
@@ -2728,7 +2737,8 @@ void flip_subdivison(Object *ob, int level)
 		} else {
 			smd->levels = level;
 		}
-	} else {
+	} 
+	else if(*set != 0) {
 		SubsurfModifierData *smd = (SubsurfModifierData*) modifier_new(eModifierType_Subsurf);
 
 		BLI_addtail(&ob->modifiers, smd);
@@ -2736,14 +2746,39 @@ void flip_subdivison(Object *ob, int level)
 		if (level!=-1) {
 			smd->levels = level;
 		}
+		
+		if(*set == -1)
+			*set= 1;
 	}
+	ob->recalc |= OB_RECALC_DATA;
+}
 
+/* Change subdivision properties of mesh object ob, if
+* level==-1 then toggle subsurf, else set to level.
+*/
+
+void flip_subdivison(int level)
+{
+	Base *base;
+	int set= -1;
+	
+	for(base= G.scene->base.first; base; base= base->next) {
+		if(TESTBASE(base)) {
+			object_flip_subdivison(base->object, &set, level);
+			if(base->object->dup_group) {
+				GroupObject *go;
+				for(go= base->object->dup_group->gobject.first; go; go= go->next)
+					object_flip_subdivison(go->ob, &set, level);
+			}
+		}
+	}
+	
 	countall();
 	allqueue(REDRAWVIEW3D, 0);
 	allqueue(REDRAWOOPS, 0);
 	allqueue(REDRAWBUTSEDIT, 0);
 	allqueue(REDRAWBUTSOBJECT, 0);
-	DAG_object_flush_update(G.scene, ob, OB_RECALC_DATA);
+	DAG_scene_flush_update(G.scene, screen_view3d_layers());
 	
 	BIF_undo_push("Switch subsurf on/off");
 }
diff --git a/source/blender/src/space.c b/source/blender/src/space.c
index 4589af745a1..ad42225f40b 100644
--- a/source/blender/src/space.c
+++ b/source/blender/src/space.c
@@ -1195,27 +1195,21 @@ static void winqreadview3dspace(ScrArea *sa, void *spacedata, BWinEvent *evt)
 
 			case ONEKEY:
 				if(G.qual==LR_CTRLKEY) {
-					if(ob && ob->type == OB_MESH) {
-						flip_subdivison(ob, 1);
-					}
+					flip_subdivison(1);
 				}
 				else do_layer_buttons(0); 
 				break;
 				
 			case TWOKEY:
 				if(G.qual==LR_CTRLKEY) {
-					if(ob && ob->type == OB_MESH) {
-						flip_subdivison(ob, 2);
-					}
+					flip_subdivison(2);
 				}
 				else do_layer_buttons(1); 
 				break;
 				
 			case THREEKEY:
 				if(G.qual==LR_CTRLKEY) {
-					if(ob && ob->type == OB_MESH) {
-						flip_subdivison(ob, 3);
-					}
+					flip_subdivison(3);
 				}
 				else if ( G.qual == (LR_SHIFTKEY | LR_ALTKEY | LR_CTRLKEY) ) {
 					if ( (G.obedit) && (G.obedit->type==OB_MESH) )
@@ -1226,9 +1220,7 @@ static void winqreadview3dspace(ScrArea *sa, void *spacedata, BWinEvent *evt)
 				
 			case FOURKEY:
 				if(G.qual==LR_CTRLKEY) {
-					if(ob && ob->type == OB_MESH) {
-						flip_subdivison(ob, 4);
-					}
+					flip_subdivison(4);
 				}
 				else if ( G.qual == (LR_SHIFTKEY | LR_ALTKEY | LR_CTRLKEY) ) {
 					if ( (G.obedit) && (G.obedit->type==OB_MESH) )
@@ -1736,9 +1728,7 @@ static void winqreadview3dspace(ScrArea *sa, void *spacedata, BWinEvent *evt)
 					}
 				}
 				else if((G.qual==LR_SHIFTKEY)) {
-					if(ob && ob->type == OB_MESH) {
-						flip_subdivison(ob, -1);
-					}
+					flip_subdivison(-1);
 				}
 				else if(G.qual==LR_ALTKEY) {
 					if(okee("Clear origin")) {
diff --git a/source/blender/src/toolbox.c b/source/blender/src/toolbox.c
index 70e5012b9c6..4ce4045a170 100644
--- a/source/blender/src/toolbox.c
+++ b/source/blender/src/toolbox.c
@@ -1077,7 +1077,7 @@ static void tb_do_mesh(void *arg, int event){
 	case 2: G.f ^= G_DRAWEDGES; break;
 	case 3: G.f ^= G_DRAWFACES; break;
 	case 4: G.f ^= G_DRAWNORMALS; break;
-	case 5: flip_subdivison(OBACT, -1); break;
+	case 5: flip_subdivison(-1); break;
 	}
 	addqueue(curarea->win, REDRAW, 1);
 }