I too have this problem with IE9. I have even set my homepage to about:blank but the delay remains. As you know, and have stated, IE9 is still in the Beta phase of its development. This means that some of the code isn't yet fully optimised. Hopefully, this issue should be resolved when it is finally released in its full version. That issue aside, I am finding IE9 quite stable and easy to use. Of course, there are differences between IE8 and IE9, but it's just a matter of getting used to them.