A couple of weeks after releasing iTunes 9, Apple has released the 9.0.1 update to work out some of the kinks.

•Resolves issues browsing the iTunes Store.
•Addresses a performance issue where iTunes may become unresponsive.
•Fixes a problem where iTunes may unexpectedly quit.
•Fixes a problem syncing Podcasts in playlists to iPod or iPhone.
•Fixes a problem sorting albums with multiple discs.
•Addresses an issue with the Zoom button not switching to Mini Player.
•Improves application syncing for iPod touch and iPhone.
•Genius is now automatically updated to show Genius Mixes.

Nothing major here, but it is definitely worth upgrading. [iTunes via Lifehacker]