Comment 2 for bug 738561

StacktraceTop:
 root_changed (client=0x93bc420, new_root=0x93be8f8, user_data=0x93dc090) at window-menus.c:527
 g_cclosure_marshal_VOID__OBJECT (closure=0xb3113c10, return_value=0x0, n_param_values=2, param_values=0x91918a0, invocation_hint=0xbf8cde20, marshal_data=0x0) at /build/buildd/glib2.0-2.28.3/./gobject/gmarshal.c:638
 g_closure_invoke (closure=0xb3113c10, return_value=0x0, n_param_values=2, param_values=0x91918a0, invocation_hint=0xbf8cde20) at /build/buildd/glib2.0-2.28.3/./gobject/gclosure.c:767
 signal_emit_unlocked_R (node=0x9195b00, detail=0, instance=0x93bc420, emission_return=0x0, instance_and_params=0x91918a0) at /build/buildd/glib2.0-2.28.3/./gobject/gsignal.c:3252
 g_signal_emit_valist (instance=0x93bc420, signal_id=177, detail=0, var_args=0xbf8cdfe0 "\001") at /build/buildd/glib2.0-2.28.3/./gobject/gsignal.c:2983