Here is the problem: https://bugzilla.gnome.org/show_bug.cgi?id=673370
The following command fix it: Meta.disable_unredirect_for_screen(global.get_screen()) -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org