It's a knownissue, but probably not one that's going to be worth the effort to fix manually. I didn't see an easy fix for it back in April, anyhow. But since it's a bug with the Dark Ice theme itself, the easiest fix is just to report it in to Audentio. Not sure if that was done the last time this bug was brought up, though.
We've only got one theme (Dark Ice) on Discovery, so I'm not entirely sure how you're able to do that. "Use Default", "Blue Solution" and "Dark Ice" are all the same theme.
Anyhow. Since quite a few people have mentioned this recently, I'm working on implementing a jQuery-based fix for this on my test forum, shouldn't take too long. Will just have to go poke at a forum administrator after that.