This is apparently a new 0day for Internet Explorer. It's untested, so play with at own risk:
http://www.frsirt.com/exploits/20050817.IE-Msddsdll-0day.php
Hm:
http://news.com.com/Microsoft+investigates+potential+new+IE+flaw/2100-1002_3-5837611.html?tag=cd.top
Question: What's a 0day?
Also, I heard about this on the news. Heh..
An exploit for an unpatched vulnerability.
There has actually been a third-party patch released by some security company (I forget which), but Microsoft has yet to release their own (haha)