Created attachment 6122 Fix Gdk-CRITICAL error Call gtk_grab_add() after the context menu has been mapped to fix the following error: Gdk-CRITICAL **: IA__gdk_window_get_window_type: assertion 'GDK_IS_WINDOW (window)' failed
Fixed in master. http://git.xfce.org/xfce/thunar/commit/?id=0f5aa4d038886d5c39306f0f95ca8babf4bc3586