As the subject says is IE6.5 or higher w3c compliant and how compliant are other browsers in displaying a w3c compliant page. Basically there is a conflict going on at a potential client since one of the vendors wants that crap to run so that his app which is browser based can function. If the o/p of his app is w3c compliant FF / Konqueror / lynx should work properly and he shouldnt care what runs on a client. Since the vendor is a software giant and i will be kicking ass, i want to make sure. google throws up pages of irrelevant (almost) stuff. On a related note are there standrds for xml and does M$ push it's own version.