)The Register Article
Apparently inserting a hex code for "1" in a URL prevents IE from disaplying anything after it, so the good ol' "dupedsite.com@dodgysite.com" method of sending users to places they didn't want to go to is now not easily detectable.
Be aware, and I would hope a speedy hotfix is imminent...
(Cue replies of "everyone should use [insert alternative browser here]"