VaultWiki 3.0.19 is now available. This release features support for vBulletin 4.2 and updates VaultWiki's navbar tab for compatibility with vBulletin's new Navigation Manager. If you want to use vBulletin 4.2, and you are using an older version of VaultWiki, then it is highly recommended that you upgrade.
VaultWiki 3.0.19 also marks our first release to officially support the PHP 5.4 branch. There may still be corners of VaultWiki that don't conform to the newly enforced Strict Standards, but any that remain can be dealt with on a case-by-case basis.
While we now support PHP 5.4, we do NOT recommend upgrading your server to PHP 5.4 at this time. vBulletin itself is largely broken in such an environment, as are a number of popular modifications, such as vBSEO. You should wait at least until vBulletin announces full support of PHP 5.4 until making that switch.
Regardless of the status of PHP 5.4, VaultWiki 3.0.19 is ready now, and VaultWiki can be installed on your site as soon as you wish.