Hi, I would move the first line with links little bit right because it's too much on left in FF3 and I would recommend you to change the orange "dots" by the links so it has different color than background. Good luck ;-)
I am sorry, but I hate the theme. Arcadem Pro's Smarty theme or whatever it is called is used too much nowadays! Make it different. I simply hate the navigation as thumbs are not click-able. Make them link to the category. Even the images are the same! Change it all. Sorry mate but I never see any popular sites that use Arcadem Pro and simply import Mochi Games.