[gfxhelp.com]

-"Vendor Sales!" orange color is almost unreadable on the background color.
-Top area has too much blue, maybe a different color would break it up a little more.
-Try a white background instead of the brown, it may look better.
-The quote/reply/etc etc button sets are a little chunky, maybe make the font in the buttons a little smaller and not so bold.
-When I click the "Community" down arrow it brings up a menu way off to the left in FF3 instead of underneath the text.
-I had no idea what the subject of your forum was until I really looked through all the forums and I'm still not 100% sure. If you had a tagline right under the "TeeGopher" text in the logo such as Your T-Shirt Resource Forum or something along those lines it would make the subject more obvious at a glance.

looks good, keep up the work.