Apple Addresses Flickering and Other Issues With Apple TV 4.2.1 Update
Less than two weeks after the release of the Apple TV 4.2 software update, based on iOS 4.3, Apple has issued a minor 4.2.1 update addressing issues with flickering, waking from sleep, and audio output. The highlighted changes are detailed i...
http://www.macrumors.com/2011/03/22/apple-addresses-flickering-and-other-issues-with-apple-tv-4-2-1-update/