Apple has released iTunes 9.0.2, which, amongst other things, again kills the ability for the Palm Pre to sync with the software.
According to Apple, iTunes 9.0.2 features the following improvements:
iTunes 9.0.2 adds support for Apple TV software version 3.0, adds an option for a dark background for Grid View, and improves support for accessibility.
No mention of the fact that it kills the Palm Pre sync hack that Palm relies on.
If you want the update, check Apple Software Updater, but if you rely on the Palm Pre sync feature, stick with 9.0.1.