Comment 5 for bug 889706

I can verify this. Gnome shell often re-spawns (crashes ans restarts) when clicking the (Mint) menu and sometimes when in "Activities" and especially when updating or adding a menu item via Alacarte (Main Menu). More than that, I've had several Gnome-shell crashes while browsing (Firefox) or reading email (Thunderbird). I only notice it when I need to switch to another running program and the bars/panels are gone. In these cases, the only thing I can do at that point is force a reboot by dropping to a prompt (ctrl-alt-F1) and rebooting from there.

Gnome-shell is defintely seg faulting according to this callout in my syslog 1:

Nov 15 12:14:23 lm12-rc-DX4822 gnome-session[4640]: WARNING: Application 'gnome-shell.desktop' killed by signal
Nov 15 12:14:54 lm12-rc-DX4822 gnome-session[4640]: WARNING: App 'gnome-shell.desktop' respawning too quickly
Nov 15 12:14:54 lm12-rc-DX4822 gnome-session[4640]: CRITICAL: We failed, but the fail whale is dead. Sorry....

and...

Nov 15 10:17:01 lm12-rc-DX4822 CRON[3643]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Nov 15 10:20:08 lm12-rc-DX4822 gnome-session[2296]: WARNING: Application 'gnome-shell.desktop' killed by signal
Nov 15 10:21:11 lm12-rc-DX4822 kernel: [ 2381.176062] gnome-shell[3888]: segfault at 7f5bddd5e230 ip 00007f5414200b30 sp 00007ffff54ffe00 error 4 in libgobject-2.0.so.0.3000.0[7f54141cd000+4e000]
Nov 15 10:21:11 lm12-rc-DX4822 gnome-session[2296]: WARNING: Application 'gnome-shell.desktop' killed by signal
Nov 15 10:21:17 lm12-rc-DX4822 gnome-session[2296]: WARNING: App 'gnome-shell.desktop' respawning too quickly
Nov 15 10:21:17 lm12-rc-DX4822 gnome-session[2296]: CRITICAL: We failed, but the fail whale is dead. Sorry....