Re: Anything Slider not working in IE 6 & 7, seems perfect in all other browsers.

[Mottie]

Every page needs a doc type in order for IE to not go into quirks mode. Basically it’s a fallback mode that even effects IE9 and disables a lot of IE7-9’s capabilities.

You might want to also check out some of the other validation problems on that site: w3c validation service