iTunes 10.6.1 has recently been released and includes the following new features and fixes:
Fixes several issues that may cause iTunes to unexpectedly quit while playing videos, changing artwork size in Grid view, and syncing photos to devices.
Addresses an issue where some iTunes interface elements are incorrectly described by VoiceOver and WindowEyes.
Fixes a problem where iTunes may become unresponsive while syncing iPod nano or iPod shuffle.
Resolves an ordering problem while browsing TV episodes in your iTunes library on Apple TV.
iTunes 10.5.3 has recently been released and allows you to sync interactive iBooks textbooks to your iPad. These Multi-Touch textbooks are available for purchase from the iTunes Store on your Mac or from the iBookstore included with iBooks 2 on your iPad.