This makes no sense to me. A tipster to BoingBoing alerted the site that a recent software update to the Sonos music system (works with PC, Mac, iOS and Android devices to stream music to one or many speakers around the home) removes a feature key for many users: the ability to play Windows DRM tracks.
Windows DRM, or PlaysForSure, protects WMA (Windows Media Audio) files, such as those you get via the ZunePass music service. Before the 3.6 version update users were able to stream these tracks through the Windows Media Player/Center to their Sonos speaks. Now it’s no longer possible.
Sonos users are understandably upset since the company did not make it super clear that the new update would do this. Plus, there’s no way to roll back to the previous version.