User blog comment:Mathmagician/Wikia's Search is Changing/@comment-4672527-20120518135109/@comment-4301259-20120519234427

Maybe you didn't click 'Save' after enabling go-search? Go to Special:Preferences - Under the Hood again and see if "enable go-search" is checked. If it's not, then check it and save. And remove the code from Special:MyPage/wikia.js.