From the Microsoft Knowledge Base:
http://support.microsoft.com/default.aspx?kbid=842242
I've upgraded my home system, and found an app that's also broken - EndNote 8. While most of you might not care, it's a bibliography generation/acquisition program which tends to be important to academics and researchers. Not sure why it broke, but the old version of EndNote works just fine.
So, for me, that's forced me to not upgrade my work machine.