So apparently this site had major issues rendering in IE, but nobody bothered to tell me this until I noticed it on someone's screen one week ago. This evening I finally booted up a Windows box, loaded up IE, and fixed the issue. Stupid IE and its css rendering. Can't blame it exclusively though I guess, apparently Moz and Safari don't treat fixed elements as floating for clears, but they act like it for everything else. Oh well, at least it's fixed now. I guess I should check my site in other browsers more often.