It appears as though the newly invented time machine does work, as the forums have just gone back in time 3 days.
What happened: The database got quite fucked up due to a number of things, a backup of the forums was installed from the 7th. This is around the time we started seeing the problems. Chances are you were getting a "Sorry we can not find a user named
As of now, the only notable things I see is a few user accounts were mysteriously deleted (gl0ry and p1mp are the ones I noticed). Right now I'm trying to put everything back the way it was. Please give this some time. I don't think we'll run into the same problems again. But if we do, a more serious upgrade will be required.