It seems this bug has been reported to upstream at http://www.nvnews.net/vbulletin/showthread.php?t=73033. AFAIK those are the "official" Nvidia/Linux forums.
>From that post, it seems this bug is actually a duplicate #47122 -- Crash if the expander in update-manager gets activated https://launchpad.net/bugs/49834 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
