When I queried about these validation errors: >> http://validator.w3.org/check?uri=http%3A%2F%2Fwww.ithenticate.com%2Fblog%2F >> >> The response was >> >> ...written in a way to be optimized for Google and Bing and not to conform >> with W3C standards. This will produce validation errors though these errors >> have no impacts on browser rendering, performance or functionality. I love people who think they are smarter than the W3. I'd refuse to pay for the work if it was contracted to validate or otherwise leave them with a bad rep, because it's a hack job and a lie, at best. That will will break miserably on a ton of mobile browsers and things that aren't IE.