There's a fix for an issue that caused iTunes to become unresponsive when updating Genius, and the update also includes improvements for overall performance and stability. Apple also recommends users download Podcasts for iOS 2.1 or later to sync podcast episodes, an update that was just released on the App Store.
This update includes the following improvements:iTunes 11.2 can be downloaded from the software update tool in the Mac App Store.
Improved Podcast Browsing
-Quickly find episodes you haven't listened to in the new Unplayed tab
-Browse episodes that are available to download or stream in the Feed tab
-Save your favorite episodes to keep them on your computer
-Episodes can now be automatically deleted after you play them
This update also resolves an issue where iTunes may become unresponsive when updating Genius and improves overall performance and stability. Podcasts for iOS 2.1 or later is recommended when syncing podcast episodes.
For information on the security content of this update, please visit: http://support.apple.com/kb/HT1222