Got a second-generation Apple TV? Get it while it’s hot: a new update has just hit Apple’s update servers.

The update is labeled 4.2.2 (build 8F305), and it’s the first update for the Apple TV since iOS 4.2.1 was released back in late March, adding video and audio improvements.

There’s no change log yet, so we’re not actually sure what’s changed. At the very least, it should break existing Apple TV jailbreaks, so be warned before you upate.