I also had this problem. At the end of the day, I tried to hibernate only to discover I couldn't open any GNOME applications or menu items including System -> Quit. I'm afraid I can't contribute any useful diagnostics because I was in a hurry, so I simply hard power-downed the laptop. But, FWIW, I had cancelled a bug buddy invocation after galeon crashed for me, earlier in the day.
-- Mysterious segfault of many GNOME programs makes gnome-session unresponsive https://launchpad.net/bugs/74682 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
