Do what I said above, that gives a centered menu, check attachment, where I have left the height and border in for you to see.
The width I found fitting your menu was 435px. The div has to be as tight as possible around the menu. If you say, as you did, 90%, the div itself will be centered, but the menu will be positioned left aligned inside the div.
Eric, your div#nav suggestion would have worked except for the width, which was too wide. And Bryon had forgotten to include that bit of code in his css file.
I'll continue with this push down issue later, have other commitments too. Right now I have a chimney sweeper approaching.
Inger, Norway
My work in progress:
Components for Site Designer and the HTML Editor: https://mock-up.coffeecup.com