Theres a slight issue with the post a reply page. Check the "new posts" icon in the attachment. Seems the breadcrums and the 3 other columns next to it (new posts/members/forum rules) are all in li tags and the first li tag is too wide. the layout is fixed width so might as well set a width on the first one
Info:
Running Firefox 3.5 on Ubuntu 9.04
Resolution: 1920x1200
cheers
+ the scrollbar in the smileys area is bad as well.