well remember nothing is absolute. You really can not completely use forum classes throughout the products because the vb4 classes are so extensively used to precisely display forum content you must create your own. At any rate like I said custom styles bring there own problems into the mix. We can only develop the product to work with the vb
product as released by vbulletin. Hacks plugins custom styles etc they all can and sometimes cause issues. I doubt if you switched to the default vb
style you would see any issue.