M openbox/framerender.c → openbox/framerender.c

@@ -203,6 +203,8 @@ RrPaint(g, self->rgrip,
                     ob_rr_theme->grip_width, ob_rr_theme->handle_height);
         }
     }
+
+    XFlush(ob_display);
 }
 
 static void framerender_label(ObFrame *self, RrAppearance *a)

M openbox/menuframe.c → openbox/menuframe.c

@@ -514,6 +514,8 @@ w += ob_rr_theme->bwidth * 2;
     h += ob_rr_theme->bwidth * 2;
 
     RECT_SET_SIZE(self->area, w, h);
+
+    XFlush(ob_display);
 }
 
 static void menu_frame_update(ObMenuFrame *self)