Apple has released iTunes 10.1.1. You can obtain the update via the Software Updates Component of Mac OS X’s Systems Preferences app. It requires Mac OS X 10.5 or later.
iTunes 10.1.1 provides a number of important bug fixes, including:
° An issue where some music videos may not play on Macs equipped with NVIDIA GeForce 9400 or 9600 graphics;
° An issue where iTunes may unexpectedly quit when deleting a playlist that has the iTunes Sidebar showing;
° A problem where iTunes may unexpectedly quit when connecting an iPod to a Mac equipped with a PowerPC processor;
° An issue where some music videos may not sync to an iPod, iPhone, or iPad.