Suggestion from an old friend...
You guys need to look into upgrading to the current version of vBulletin. The site has been running an old, outdated beta version for far too long. There are something like 10-20 upgrades that have been made available, leading up to the official stable release. Time to get up to date. It should fix some bugs that nobody's aware of and add some more functionality. I know it's not a top priority, but it should probably at least be done for security sake if nothing else.