I had incorrectly indicated in that question that this was a bug in lightdm. I was mistaken. The best way to deal with this is to re-report it (against unity or unity-2d in Ubuntu). Please see the question for details. I'm marking this report Invalid. I apologize for my error.
** Changed in: lightdm (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/813390 Title: Oneiric ALPHA 2 after updates unable to login To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/813390/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs