Overall the structure and design of your site/forum is very nice, colour usage compliments the theme and looks inviting to "potential members". If I had to be picky, I would suggest you exchange the
navbits_start.gif &
navbits_final.gif to something more custom, something that is both consistent with your theme and colour.
Maybe it's just me, but the footer images seem a little off as they just fall short on each end. Maybe expanding that to 100% might look better.
Like I said, overall the structure/style and images look good and compliment each other nicely so I can't really say anything negative.
Goodluck with your site Aunt Clara.