itunes is currently unavailable
My Apple TV 3 has been playing up for a few days, possibly since the latest update - not sure.
Basically, i can no longer play any purchased TV/movies or iTunes Match music via the Apple TV (still fine via my other Apple devices - Mac, iPad 2, iPhone 4S) and the following message appears, accompanied with a black screen and yellow triangle "iTunes is currently unavailable. Try again later."
I've searched the forms boards and found a bunch of possible solutions that haven't worked: reset and/or restart Apple TV, Sign out and back in to iTunes on both the Apple TV and my Mac, switched Dolby Digital from Auto, On and Off - nothing has worked.
Could this be an Apple server authentication issue? On purchased movies and TV, it's at the authentication stage that things seem to stop.
Any help/advice would be hugely appreciated. Right now, iTunes Match and Apple TV aren't doing the job I paid for.