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Less than a week after issuing a major update to coincide with iOS 5, Apple has provided another minor update intended to fix bugs for its Apple TV set-top box.

From Apple Insider:
Apple TV software update version 4.4.1 is now available for download on the device. It can be obtained by navigating to "General," then "Settings," and choosing Update Software.

According to Apple, the software update addresses an issue that required a small number of Apple TV units to be connected to iTunes in order to complete last week's 4.4 update.
  Apple releases minor 4.4.1 software update for Apple TV