I've fallen for the "fake search bar" beside the main nav bar on the forums quite enough times. While the search bar isn't really fake, it searches the main site with Google (how lame) instead of the forums. I have to dig down into the forum's nav bar and use the search from there. The main search bar is next to useless for searching the forums, and although the forum built-in search isn't much better, at least it returns results.