[Haskell-cafe] diffs on HaskellWiki

I've noticed that when viewing changes on HaskellWiki, the diffs are missing. We had a similar problem on the OpenSSL wiki (which, like HaskellWiki, is based on MediaWiki), and the sysadmin said he fixed the problem by switching from the external diff engine to the internal diff engine. Is there someone who could look into this and possibly make that change to the wiki's configuration? I looked around the HaskellWiki and couldn't find any mention of how to contact a maintainer. Thanks, --Patrick