I'm sorry, I'm afraid the site just won't validate without significant rewriting. There are efforts to slowly improve the markup, but the generated code is not standards compliant.
While that is true, and I don't expect it to be fully standards compliant, if you view source for our page...
http://knr.dkpsystem.com/news.php...you'll see that there's some stuff done that is flat-out illegal HTML and it's amazing the browser renders it at all.
In particular, look at the source and look at all the script and style code between the </head> tag and the <body> tag. All of that should be INSIDE the head section.
Is there anything you can do about that? I imagine a lot of the reported validation errors are cascaded from that improperly injected code.