Yep thanks for actually providing a link
Makes it easy to provide support.
As long as you use any style that conforms and uses the common vbulletin 4 released style class names you should not have any display issues with styles.
When you get into a style that uses custom style class names like shown above tcatleft tcatright etc and the templates are for the forum use those custom names your forum will look different.
Our adv_gallery css template maps our the style class names for say sbox and mbox which are the top table headers to the normal vb4 style head colors which I beleive are forumhead and foruminfo depending on what things are. This should give you a hint if you look at the stylesheet this is how its done we map the specific vbulletin stylevar names
Content visible to verified customers only.