It’s not that I go out of my way to use non-standards compliant HTML or CSS, but some of the specs seem pretty petty (tags must be lower case, img tags must have an ‘alt’ quality, you have to close your break tags), so I certainly can’t guarantee that the site will remain valid for long. And I’ve only checked the front page. But, just at the moment, the front page does validate both for XHTML and CSS.
If you have no idea what I’m talking about – it’s not important.