vBulletin 4.2.2 Support
Since vBulletin 4.2.2 is now stable, check compatibility with the new version. Since vBulletin 4.2.2 touts PHP 5.4 compliance (finally), update VaultWiki so that callback signatures reflect 4.2.2. Compatibility with earlier versions in this regard is a moot point, since earlier versions would throw their own PHP 5.4 errors anyway.