Hey everyone.
I put a ticket in at VaultWiki regarding this issue, but also wanted to run it by you folks to see if any of you have a quick fix. For reference: I'm using the newest version of VaultWiki Lite and Vbulletin 4.2.0 Alpha.
When I install VaultWiki, it creates some custom StyleVars (presumably for use in the Wiki's separate style function). When doing so, it overwrote my existing StyleVar Editor leaving only a single entry. Here's a screenshot:

. Removing VaultWiki does eliminate the problem. I was only able to restore the StyleVars Editor by updating vB (I suspect running the updater again would do the same).
Has anyone else experienced this? Do you have a fix? I really like how VaultWiki looks on the page and with the MediaWiki issues I've been having I'd prefer to keep VaultWiki (but absolutely need StyleVars Editor for style modification). Let me know if you need more information.