[JavaBrewer]

Windows users should handle all Apple/iTunes updates with CAUTION.

I have not updated to version 4 OS but I did try to install the latest iTunes update on my Win7 workstation. Install went smooth until I tried to sync my iPhone. Despite Win7 seeing the phone iTunes did not. Spent the better part of the morning reading Apple forums and trying suggestions (usb drivers, reinstall, permissions, services, etc...) to no avail. The 'fix' was to roll back to the older version of iTunes.

Another Windows issue was using the iTunes "restore" function. My one and only attempt at a restore ended up failing and rendering my iPhone a fancy paper weight - iPhone would not boot. Luckily I have a Mac (family computer) running iTunes downstairs and using that setup the restore worked fine.