I've had Mailman 2.05 installed and running on my linux box for many months, but now all of the sudden it's having problems. When I try to get into list administration, or if a user tries to get into their options page, or if a new user tries to subscribe, it reports an error:

"We're sorry, we hit a bug! Mailman experienced a very low level failure and could not even generate a useful traceback for you. Please report this to the Mailman administrator at this site."

This is the case for all lists. The main interface pages work; I can get to the list description pages, message archives and admin login pages, but no farther.

The last time that I'm certain it worked was Monday, and I did some work last night (installing OpenSSH) that I suppose could be related. But where do I start in diagnosing the problem? I'm no linux expert....

Rob