W3C is perfectly stable, its taking issue with your non-quoted href attributes. Look at error # 12: "an attribute value must be a literal unless it contains only name characters."

As a general rule, quote all attributes, much more future-proof (XHTML requires all attributes be quoted), and much easier on the eyes when using a syntax-highlighting editor. FYI, I downloaded a snippet of your HTML, quoted the attributes, ran it back through the validator, and it validates (save for the lack of a doctype).

Hope this helps.