I've also experienced this problem. If I kill -9 gnome-shell, then everything suddenly starts working again. It won't respond to SIGTERM.
My backtrace looks similar to Jason White's, and I have a core file if someone wants it (Debian x86_64 Wheezy, gnome-shell 3.4.2-2). -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
