FTA; Attacks based on code that exploits a bug in the way IE handles XML are expected to become much more widespread... http://www.infoworld.com/article/08/12/09/New_Web_attack_exploits_unpatched_IE_flaw_1.html
Why would usual web surfers use IE, when its pretty much unsafe. but as a designer my self i have to test my webpages on IE, that i hate to do.