This is a pretty awesome theme. Well done. I've been testing this in FF1.5 and 2 as well as IE6, 7 and now 8 beta and it's working as expected.

The only issue I have come across is that the color module is not being played in the theme configuration which means a hack to the CSS if users want to change the colour of the theme. If this was fixed this theme would be up there with one of the best Drupal themes avaliable.

Well done.