Serious problems with upgrade to vb 3.5!!

[Lea Verou]

I upgraded my forums to vb 3.5 but there is a bunch of problems...
To give you an idea of the problems:

• The admincp doesn't have all the options it should: some of them don;t have text!
• The WYSIWYG editor and even the classic editor with formatting abilities are lost and there is only a plain textbox no matter what I select
• Javascript seems to be completely not working, as also in the site menu the menu images don't change on hover
• When I press edit options I have this warning at the top of the page: Warning: Wrong parameter count for max() in /profile.php on line 1018
• In edit options the user can't change his preference in editor

Probably others too that I can't recall at the moment...
My previous version was 3.0.7 and I had some hacks which are probably overwritten now, such as vbadvanced...
However they refuse to support in vBulletin.com cause they say that the hacks' tables are still in the database...

Any ideas?

Thanks a lot in advance