[ubuntu] Login and su - fail

view story

http://ubuntuforums.org – Hi, After messing around with pan and fuse a bit I seem to have broke the ability to su. I can "su user" but cannot "su - user" any longer. Also "login" now fails with authentication failed. In the log I can see permission denied on changing permissions of the pseudo terminal. Any thoughts on how to begin figuring this out? SSH and everything else seem to work just fine I should note. (Hardware)