This could really have sone serious consequences against the IE team at M$ and what really bothers me is that this is isn't even difficult to reproduce. You all might want to "view source" next time you are typing your credit card in an online order form.

::A vulnerability has been identified in Internet Explorer, which can be exploited by malicious people to display a fake URL in the address and status bars...

Secunia - Advisories - Internet Explorer URL Spoofing Vulnerability