I don't know if this has already been addressed, but it appears there's an issue with one of the templates...
On the uShop main, it looks like this:
http://www.half-blood.net/files/moo.jpg
The other pages look fine:
http://www.half-blood.net/files/moo2.jpg
My guess is it has to do with some < if > < /if > stuff regarding categories... I haven't looked into the problem yet personally, but I thought I'd post this since it's probably something that everyone has an issue with? =O
(and it's not my coding... it's all valid xhtml 1.0 so there are no open tags or anything like that.)