Having spent 8 hours on this problem yesterday, I now know about all the options, but not resolved core issue yet. Here are the details:
(1) When you install bootcamp 3.2 with automatic upgrade, it installs some drivers and one of those drivers makes your keyboard text characters incompatible with Powerpoint 2010, so any text changes causes powerpoint to crash.
(2) Your best defense would have been a savepoint before installing the upgrade, but if you dont have that, then it is not easy to rollback.
(3) One option is to uninstall bootcamp 3.2 from windows - that resolves the core issue, but also removes the other bootcamp drivers so your track pad becomes less responsive, etc.
(4) You can install bootcamp 3.1 again - the 64 bit version is available on your Mac OS X DVD that came with your laptop, and it is a pretty easy re-install.
(5) However if you reinstall the 3.1 from the DVD, then the powerpoint problem returns again. At that point, you might as well get the bootcamp 3.2 upgrade installed again, as your core problem remains either way.
(6) The real solution is to identify the specific driver that is giving that problem, and I have narrowed it down to one out of 4. I could do trial and error method to find the specific driver, but I made an appointment with the genius bar to take my macbook ino the store and have them figure this out.
(7) In the meantime, I also decided to bite the bullet and buy Office for Mac 2011 for $199 (I will get it at the store today), and that will take away some of the need to use Office on Windows 7 as I can then use the Office on Mac - I heard the 2011 version is very compatible to the latest office for windows version, so that should resolve some of the hassles.