One of the new features, the so-called "porn mode," or private browsing, is an interesting development. Even funnier is that the private browsing feature is the default mode. Just what is Microsoft saying about its customers?
As always, I recommend against putting beta version on your production machines. Use a throw-away computer to test software. Better yet, use a virtual disk or Faronics Deep Freeze. Or ... skip IE altogether and get a Mac.