I also like your header image
However:
1. I like font Arial, but it's not good for a UBB IMO. Use Verdana instead.
2. link/visited link colors look very bad without the blue background. Suggestion: make your forum's background color dark blue and change copyright color to white, or just make link color/visited link color much darker. Actually, I like the 2nd option better, and that's with also changing Text Color to a dark one, cause it doesn't look so well on your light blue (altcolor2).
3. you're using UBB's default icons, I suggest you to make your own ones to add a more special feeling.
