"C:\Program Files\Internet Explorer\iexplore.exe" -extoff
This will disable all your add-ons when it starts.
you can remove the -extoff switch after you find out which add on was
causing the problem.
Also when ie8 started after i used this switch, it opened to the About: page
I just changed the url like normal and it worked fine.
I was the java add-on.
I disabled it, and all is well now.
im also on windows 7 os.
surely this will be patched, but until then....