iTunes 9.2.1 is now available for download and finally fixes the numerous bugs many of us have been experiencing:
• Disables older versions of some incompatible third-party plug-ins
• Addresses minor issues with dragging and dropping items
• Addresses a performance issue when first syncing to some devices with iTunes 9.2
• Addresses an issue upgrading to iOS 4 on an iPhone or iPod touch with encrypted back-ups
• Addresses other issues that improve stability and performance
You can get this update via Software Update on your Mac, or download it directly from the Apple website.