Apple on Thursday released a software update identified as version 4.4.3 for its Apple TV set-top box, though what changes it includes are unknown.

The new Apple TV update is labeled build 9A4051, and can now be downloaded directly from the device. The version number would suggest that it is a minor update, fixing issues in the Apple TV version 4.4 software update that accompanied the launch of iOS 5 in October.

Version 4.4.3 marks the third update to have arrived since the release of 4.4, a more significant update that added AirPlay Mirroring support, Wall Street Journal Live, National Hockey League Content, Photo Stream, and iTunes Trailers. Details for Apple TV Software Update 4.4.3 have not yet been revealed by Apple.

The last Apple TV update arrived in late October with Software Update 4.4.2. It addressed an issue that required a small number of Apple TV units to be connected to iTunes in order to complete an update.