They probably tried to upgrade vBulletin (also the software I use here) to the newest version.
If anybody's interested, we're running a heavily hacked (err, modified) version of vBulletin 2.0.3 here. Version 2.2.x of the software is out, BUT since I have modified this one extensively, I probably won't upgrade unless a major problem arises.
As soon as I have some time, I plan on re-writing the chat room in PHP and more fully integrating it within the site.
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