Apple just released an update to iTunes, bringing the latest version to 9.0.2.
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.
According to , this update also kills Palm Pre webOS sync. Again.
You can download iTunes or through software update.
Updated: MuscleNerd has just confirmed that the update does not affect the Jailbreak, users can still use custom firmware. You can easily upgrade to 9.0.2.