First off - fantastic theme. Just...just great.
The only problem I've run into is the top menu. It doesn't show up at all. Can't figure out why. There are links in the menu, it is set up correctly to be the default menu, and it shows up. There are just no stylings on it for some reason.
Here's a screenshot of the problem: http://img20.imageshack.us/img20/8029/selection006.png
And here is the page: http://metagnosis.net
I have all plugins disabled. Viewing this in Chrome and Firefox 3. Wordpress 3.0.