In mid July I was trying to buy some Apps or Music from the iTunes Music Store. It seemed like every day I was getting a message that my account had been disabled for security reasons. It was really annoying. I was having to change my password for iTunes every day. It was really annoying. I tracked the problem down to my Apple TV. I had recently updated the software on my Apple TV. There was one small change in the Apple TV software that it now does not allow Apple IDs to contain a space. The space key is not even on the on-screen keyboard.