Key_Master - 1:26 am on May 10, 2008 (gmt 0)

Even if one were to believe that M$ was responsible for the web standards behind http headers, there is nothing noted in your link that would make this user-agent invalid, even by "M$ standards".

I don't want to argue with you over it but there is no user-agent standard so it can't be invalid. Feel free to ban it if you wish.