When do you get that gnome-session crash? During the same run that your theme issue? gnome-session crashing should bring you back to gdm, did that happen? Did you get the issue every time or did you get it only one?
When do you get that gnome-session crash? During the same run that your theme issue? gnome-session crashing should bring you back to gdm, did that happen? Did you get the issue every time or did you get it only one?