I have the same problem. It happen very frequently (10 - 15 minutes) but I'm not able to reproduce manually the respawn. Most time happen when I use the upper-left activity corner feature of gnome. I have Ubuntu 11.10 with gnome-shell but happen the same thing also with cinnamon. this is the dmesg log of gnome when respawn.
[ 1265.306099] show_signal_msg: 15 callbacks suppressed [ 1265.306104] gnome-shell[4138]: segfault at a ip b6c679cd sp bfb831d0 error 4 in libglib-2.0.so.0.3000.0[b6c08000+f7000] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/889706 Title: Gnome-shell randomly crashes To manage notifications about this bug go to: https://bugs.launchpad.net/linuxmint/+bug/889706/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs