User blog comment:Ohmyn0/Chat is Now in Wikia Labs/@comment-2194058-20110630221019/@comment-1997905-20110630225155

That's because the parser ignores anything but double bracket links. It also ignores the pipe trick, all HTML tags, parser functions, and MW tags like. Furthermore, it can't resolve domain prefixes, like,  ,  , or. It can resolve, however.