I too had a crash occur on shutdown. I was notified when I started back up that it had happened. Attached is my crash report.
** Attachment added: "Crash Report" http://librarian.launchpad.net/6734192/_usr_bin_mono.1000.crash -- Extremely rare mono crash on shutdown https://launchpad.net/bugs/90861 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
