Why has AirPlay to Apple TV stopped working from 3rd-party apps? I have been using AirPlay to stream stuff to my Apple TV for months, and it's been great. In the last week or so it stopped working for 3rd-party apps.


I use Radium on my Mac. This used to work fine but now when I unmute Apple TV it mutes itself again as soon as it starts to play.
I use the Digitally Imported app on my iPhone. I used to be able to stream this to Apple TV but now when I choose it it stops playing.


In both cases Apple TV shows up as a potential output device, and disappears and reappears as it should when I switch AirPlay off and on again on my Apple TV. I've tried 2 different routers and both wired and wireless connections. There is nothing relevant in the Console logs on my Mac that I can see.

The odd thing is that iTunes on my Mac can still play to it, and AirPlay mirroring works fine too, so it does seem to only affect 3rd-party applications.

How do I fix this?
The recent 5.1 software update to Apple TV seems to have fixed it.