Bug#622405: Possibly libcogl bug?

[Oren Held]

I experience a similar behavior, and luckily syslog has a relatively useful error message:
'gnome-shell[8568]: segfault at 48 ip b6cf7981 sp badacf00 error 4 in libcogl.so.5.0.0[b6cd4000+77000]' 

Now quick googling revealed its related to a libcogl bug as reported herE: https://bugzilla.gnome.org/show_bug.cgi?id=660184

and fixed here:
http://git.gnome.org/browse/cogl/commit/?id=1f61868fed78457c0da487d2a270804fb70dce8f

However, as the original report is several months old, this might not be related.