This skin claims to be xhtml and css compliant but fails validation for both. I corrected the css myself but the xhtml doesn't validate because of a poorly structured block of Javascript injected into the page by the skin. I sent 2 emails to the developers support email address to find out how to adjust the skin to make it compliant but never received a reply. We have since identified that there was a problem receiving email from the developer and have worked with them using updated skin components and now have our site validating for Xhtml and Css
I can't fault this product or the support that comes with it.