Yeah, the only work around we know is to avoid parenthesis in titles. As long as you replace () with  you'll be okay.
Not a Thread, but under the "What's New?" tab, there is a link called "Thumbs Up?" I clicked it today and it directs here: http://guildwars.incgamers.com/forum...bs_center.php?
But that gives a 403 Forbidden error.
Gah, looks like the same bug, thanks for noticing it. The title is the name of the upvoting plugin thus the question mark. Alas I cannot remove it right now, just pretend it isn't there :P