A lot of people who visit my website use MSN Explorer. I don't have MSN Explorer on my PC, only IE6, IE7, and IE8. I test my sites to be compatible in all IE browsers from 6 to 8 but I am wondering if I should be testing for MSN Explorer as well? I heard MSN Explorer was just a IE browser with a shell around it to integrate all their features (i.e. Hotmail, Messenger, etc) but I'm wondering if anyone can confirm this or not?