The update, also available directly from the iTunes Download page, supplies fixes for the following bugs, according to the update detail:
Addresses an issue where iTunes may become unresponsive when syncing an iPad.
Resolves an issue which may cause syncing photos with iPhone, iPad, or iPod touch to take longer than necessary.
Fixes a problem where video previews on the iTunes Store may skip while playing.
Addresses other issues that improve stability and performance.
For Windows 7/Vista/XP SP2 users, iTunes 10.2.2 fixes memory corruption issues in the WebKit framework, which could enable a man-in-the-middle attack to occur while browsing the iTunes Store via iTunes on a PC, potentially leading to an unexpected application termination or arbitrary code
execution. Apple credited several researchers participating in TippingPoint's Zero Day Initiative for discovering the flaws that it has subsequently patched in this update.
The original release of iTunes 10.2 delivered several new features and improvements, including syncing with iPhone, iPad and iPod touch devices running the new iOS 4.3, and improved Home Sharing, which allows users to browse and play content from iTunes libraries via the Home Sharing iPod app feature on iPhone, iPad and iPod touch units upgraded to iOS 4.3.