IE6 worked fine a few moments prior to IE7 being installed. It looks like IE7 is *sorta* working, because the tab title changes, favicons show up, etc . -- but the content area is completely blank, and the window cannot be closed (I have to kill it in task manager, even though it's not hung). Additionally, typing an address into the address box causes a popup that says "<address> is not available". The alt key also doesn't show the menu bar.

Any ideas?