I was getting the same thing, read these posts, and went out and bought an
Apple TV. At first I was getting a similiar message about protected content, but it also said check my HDMI cable connection. I know it wasnt falling out, and I had a cheep spare cable connected, so I swapped out for a better (not great, not apple) cable. The message went away and I could play through the AppleTV, but going back to the little HDMI adapter cable I got the same old message on the same movie. I am using a version 1 adapter, and I see
Apple has a new adapter out now, and I may try that to see if Apple has listened to any of this stuff (there are a lot of people reading this tread). The experience was not totally smooth, and the Picture did not seem the best. I eventually installed the iPhone remote app for all of this, turned on home shareing on everything, chose the movie from my phone, and everything starting working really well. (go figure, why does it work better with the iphone remote ???)
A few observations, my movies were all legitmate, on iTunes, and my TV plays the same movies if on legitimate DVD's, through a playstation, netflix, or any other player I have. Why should this little adapter be the only thing to say that the display is not authorized to play this protected content. I checked the web for this HDCP thing and found only a handfull of NEW TV's that were HDCP compliant. Apple cant expect to run a video business if it wants to suddenly implement a standard which wont work on 99 percent of the equipment people are using, and sell equipment which only works on a few select TV's without warnings and at least a transition period where the software will allow the connection, but warn you of things to come.