diff -up metacity-2.24.0/src/core/display.c~ metacity-2.24.0/src/core/display.c

--- metacity-2.24.0/src/core/display.c~	2008-08-18 08:29:06.000000000 -0400

+++ metacity-2.24.0/src/core/display.c	2008-10-31 15:19:02.000000000 -0400

@@ -3264,9 +3264,11 @@ meta_display_begin_grab_op (MetaDisplay 

   if (display->grab_op != META_GRAB_OP_NONE)

     {

+#if 0

       meta_warning ("Attempt to perform window operation %u on window %s when operation %u on %s already in effect\n",

                     op, window ? window->desc : "none", display->grab_op,

                     display->grab_window ? display->grab_window->desc : "none");

+#endif

       return FALSE;

     }