I just installed Windows 7 x64 (RTM version) on my workstation and then installed Office 2007 Enterprise Edition.
All of the Office products work fine with the exception of Word. When I run Word, my mouse pointer constantly switches from pointer to the "activity circle" (the hour glass).
It will stop occasionally for brief periods of time, but it consistently happens when ever I have word open AND my mouse is anywhere in the word window.
I have installed Service Pack 2 and reinstalled Office to no avail. I also have a machine at home with the exact same software (Different Dell Model) that does not have this issue.