Forum Weird default template behavior please help
 

Dear users
i recently moved and updated successfully my forum from 3.8.2 to 4.0.2. My problem is that i install a commercial skin fro vbulletin 4.02 and it broke my default as you can see here : http://img716.imageshack.us/img716/7879/forumprob.jpg

i also installed firebug but i din't manage to do anything, as far as i suspected probably would be something with my template style vars but what, any help would be welcomed.

thanks in advance
Dimitrios