VaultWiki 2.1.0 was released this evening. Users of VaultWiki Categories should update that to version 1.0.2 before rebuilding any caches.
There are several major additions with the newest version. Data managers for links and namespaces allow for easier mod integration and higher performance. A Namespace Manager in the AdminCP allows for easier installation of VaultWiki and more straightforward management of the various namespace settings. The long-awaited Protect tab is now available, allowing for multiple levels of protection for wiki articles. And finally the Special:Search page, which includes a front page that appears when a user doesn't type the title in the URL.