Apple Issues New 4.2.2 (iOS 4.3) Update for Apple TV
Apple today issued a new software update for the second-generation Apple TV, moving the software version to 4.2.2 as reported by the device. Apple's servers, however, register the update as a new build of iOS 4.3 carrying a build number of 8...
http://www.macrumors.com/2011/05/11/apple-issues-new-4-2-2-ios-4-3-update-for-apple-tv/