Search Feature
The whole search feature is pretty pointless and buggy.
First, when you search with the search box for the wiki in the nav bar, you just get redirected to the advanced search page. Doesn't make sense at all.
Also, the search finds certain words in articles and ignores others. This seems to be a bug.
And why the hell is there an option to search other "namespaces" (the whole about your namespaces is very confusing BTW) than the default, Wiki namespace? This is just confusing, especially for regular users, and doesn't make much sense either. Why should anyone want to search the header namespace for example?
Also, when there is no result in a search you are getting the regular "no results" page of VB. Instead it should redirect you to the same page you get when you search for a word that exists in an article, but not as an article title.