This is a new issue for me, not sure if its related to iOS5 or not. I enable airplay via the CNN app to watch the channel on my AppleTV2. Everything is working fine then after a couple of minutes my iphone goes to sleep (Auto-Lock) and airplay is lost. It used to just stay on, avoiding sleep, or either the airplay continued even after Auto-Lock, I don't remember. I shouldn't have to go turn off the sleep (Auto-lock) function, so don't suggest that. I would then have to re-enable it --- not how it's supposed to work. ---------- Note that if I monitor the iphone screen when it dims, I can touch it to bring it back to full brightness and avoid having it go to sleep (Auto-Lock). Again, this is a workaround, but not how its supposed to work (nor how it used to).