Comment 5 for bug 591660

A better patch has been produced. It has been submitted to clutter upstream. If the patch is accepted, it should be fixed for Maverick.

http://bugzilla.clutter-project.org/show_bug.cgi?id=2148

--- clutter/x11/clutter-event-x11.c 2010-03-18 13:18:06.000000000 -0400
+++ clutter/x11/clutter-event-x11.c 2010-06-21 16:11:10.468517306 -0400
@@ -816,6 +816,28 @@
               goto out;
             }

+ Window child_return, root_return;
+ int root_x_return, root_y_return;
+ int win_x_return, win_y_return;
+ unsigned int mask_return;
+
+ gboolean ret = XQueryPointer(backend_x11->xdpy, xwindow, &root_return, &child_return, &root_x_return, &root_y_return, &win_x_return, &win_y_return, &mask_return);
+ if (ret && (child_return==None))
+ {
+ /* The mouse is directly over the stage (no obstructing window) */
+ gint x, y;
+ guint width, height, border, depth;
+ XGetGeometry (backend_x11->xdpy, xwindow, &root_return, &x, &y, &width, &height, &border, &depth);
+
+ if ((xevent->xcrossing.x >= x) && (xevent->xcrossing.x < x+width) && (xevent->xcrossing.y >= y) && (xevent->xcrossing.y < y+height))
+ {
+ /* The mouse is still inside the stage. Discard the Leave event. */
+ CLUTTER_NOTE(EVENT, "Discarding Leave Event");
+ res = FALSE;
+ goto out;
+ }
+ }
+
           /* we know that we are leaving the stage here */
           _clutter_input_device_set_stage (device, NULL);
           CLUTTER_NOTE (EVENT, "Leaving the stage (time:%u)",