It resized my window. D: If it's meant for a certain width, just center it, don't make the browser window fit.
The "Change Theme" dropdown does not respond when I click it, and the paypal button seems oddly placed on all of the webpages. You might also want to have the mouseovers for the tabs to be different from the active tab image.
"Need a custom made signature. Than go to borderlinesigs." => "Need a custom made signature? Then go to borderlinesigs."
Couldn't really read the "KBjr" in the header, had to look at the title bar to see it. The red doesn't really match the white and blue, either.
The links in the sponsors page change the alignment of the text, makes things odd. Same thing for the link in "Hosting".
I give it a 5/10 (average), though I should probably grade stricter for someone trying to get people to pay for web design.