XHTML and W3C Homepage

Out of curiosity, how exactly is the XHTML validator getting past the
homepage for W3C? The basic spec for XHTML should not allow it to
validate the page for a number of reasons:

Markup tags are in upper and lower case (consistancy).
Attributes are not quoted (lots of them).
Terminated elements are not adheared to (li tags).
Non-Terminated empty tags are present (img, br and hr).

Since I'm currently working on a lot of XML/XHTML and trying to get it
all nailed down, I just thought it curious that the W3C's page doesn't
conform and displays the "validated" tag at the bottom of the page. Am I
missing something?

Just think'n it's a little odd,
Aaron W. Silver
awsilver@renderology.com
www.renderology.com