incrediBILL - 8:41 pm on Mar 4, 2012 (gmt 0)
Since I am not a programmer
Don't worry, HTML isn't programming, it's text markup.
Glorified 21st century high-tech typesetting to be exact :)
However, if Google doesn't care if their own code validates I would question whether the search engine cares that much about 100% valid code.
Personally, I don't feel bad if my page validates but the little piece I added from the big mega-billion dollar company doesn't validate.
I'd point that out to a client and show them you simply do better work than Google does ;)