Apple released iTunes 9.0.3 Monday afternoon with fixes for several issues including a problem with syncing Smart Playlists with iPods.
The update also corrected an issue where account passwords weren't remembered between purchases, fixed an issue where iPods weren't recognized when connected to your computer, and improved stability and overall performance.
The iTunes 9.0.3 is free and available via Apple's Software Update application, or as a downloadable installer at the Apple Web site.