Apple began alerting customers on Friday morning that Apple TV-compatible versions of the iTunes LP albums they've purchased are available and ready for download.
iTunes LP albums were initially compatible only with iTunes on Mac OS X and Windows. The iTunes 9.0.2 and Apple TV 3.0 updates, however, added support for playing iTunes LP content on Apple TV.
iTunes LP is a special album format that includes additional content such as liner notes and behind the scenes videos.
The email notifications customers are receiving include links to redownload Apple TV-compatible versions of the iTunes LP albums they have already purchased. You can also check for updates in iTunes.