I wish I could take credit for the blue, but what's really happening is just an error. IE doesn't correctly multiply PNG24 format's transparency mask (well, alpha channel) to whatever it lays on top of so it blends it to a default background, the color blue.
One of the best improvement is that there's no "This page cannot be displayed" hoo-haa. It just says "This website cannot be found" in the little pop-up and if I spelled it wrong, all I have to do is click and edit. In IE, you would have to delete the msn URL thingy