This is a great look; however, I wanted to suggest a few things.
Firstly, the banner that says boutcheetah isn't centered, as the Z to the left of the banner takes up space. Find an alternate place for this Z and just center the banner.
Also, center the tabs below the banner (home, download, forum, rankings, profile, my message, logout).
Additionally, the spotty looking side panels to the left and right of the main page should be a solid color (I suggest black or the same color green of the tabs mentioned earlier).
Just a few thoughts!
<<Firefox