[Mediawiki-l] Media Wiki just stopped working

[Chuck]

We run four instances of MediaWiki on our website. Two of the 
installations have been down for months and the other two are working 
fine. We've generally had few problems with MediaWiki software other 
than the standard spam headaches.

I upgraded the software on 3 of the wikis last night with no problems. 
Strangely enough, the upgrade worked for one of the wikis which is down. 
But I can't get the wiki to display anything at all.

http://www.infoshop.org/octo/matrix/index.php

I've checked the paths in the LocalSettings.php file. They look fine. I 
even compared them to another LocalSettings file for a wiki that works. 
I just can't figure out why this wiki is displaying a mysterious Server 
Error page when the other wikis are working.

We upgraded to PHP 5 recently, but these two wikis went down before that.

Have people had any experiences with hackers or spammers bringing down a 
wiki by inserting bad data?

I'm really banging my head against the wall on this one, so any insights 
are appreciated.

Chuck

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Bread and Roses Web Design
serving small businesses, non-profits, artists and activists
http://www.breadandrosesweb.com/