I'm not sure about the colour theme. I'm not a fan of this colour (purple?). I would have opted for the thead to be another colour just so it brings out the style. Being a light gradient the white text makes it very hard for users to see, maybe set the text another colour (applied on the .tcat & .thead gradients) so it looks more prominant. Either that or re-colour the gradients.
Logo looks crammed and it doesn't give off the prominant feeling that a logo should do. The horizontal graphic running alongside should be lowered so it runs underneath the image of the woman. All in all the logo looks a little flat and bland and lacks perspective.
The text on the buttons are very hard to read, I've got my nose up against the screen and still find it diifficult to read. You could either re-colour the buttons base (re-colour it to a darker colour) or add a
Drop Shadow so it's a little easier to read.
Overall, I'm not a big fan of the colour theme but goodluck with your forum.