I dare you to find me a page on FDR that *DOESNT* set off the validator's alarm bells! 
I'm sure there's a way to make the site validator-compliant, without breaking all the embeded content (scripts in the head, youtube videos in the body, etc). That would take the steady hand of some detail-obsessed X/HTML guru (which I am not). I'm not sure whether you can do that as HTML 4.01, or XHTML 1.0, or whatever, but if anyone would like to take a crack at it, I'd be glad to help out where I can (uploading files, and what-not).
Greg.