This message is for all sid users who have a broken PAM : The message referenced below was sent to debian-devel-announce last night. It is from the PAM maintainer and explains what happened and how to fix your system. Read it, then go subscribe to debian-devel-announce so you get these sort of announcements.
http://lists.debian.org/debian-devel-announce-0106/msg00011.html Sorry for the tone of this message, but it is rather annoying to see numerous threads on debain-user repeating the same "how do I fix unstable" question when the answer was already sent by the maintainer (not to mention several different techniques already discussed on -user). -D