I really like your header, it's very unique. There's some issues with the navbar and welcome bar. The content bar on the left is messing up the general alignment of your forum, and it would be better if it wasn't there and the forum was centered. I also don't like the repeated Guest-Welcome and Nav Bar on the bottom of the page, it just looks cluttered IMO. Other then that it's a very nice style and forum, you have some forums that have little to no threads in it, so I would delete them or somehow merge them with other, more popular, forums.