It depends on what your web pages claim to be coded as.
For instance valid XHTML needs every tag to be closed. EX: <tag /> Make Sense? It will not effect the display or goog, only validation. The way goog gives you the code the tags are not closed.
Also they do not specify java script language(at least they didn't used to when I put their crappola on my site.
EX: <script type="text/javascript" language="JavaScript"> NOT: <script type="text/javascript">
They should really get their crap together, they are the god of the internet!?
But really it does not mean a hill of beans unless you are just really picky(I AM).
Hope this helps, Dan
Hey! I just saw your site, I am a Sox fan tho. Can't shake that Southside upbringing. I'm gonna check out your forums now.