Okay, I tried a bunch of stuff and this is the closest I can come. I cut the ad div out completely and then pasted it back in and for some reason that made a big difference. Go figure.
It looks pretty good, except that I want the lower menu centered. I used the text-align center on all the #lowermenu css but it still isn't centered. Grr!
Also, I want the text to be in the vertical center of it's block but can't figure out how to do that. I tried changing the vertical-align but it has no effect. :-/
Any ideas?