Reader Drew Isaacs is unhappy with the latest Apple TV update. He writes:After reading your first look at the Apple TV 6.0 software I was anxious to upgrade. Unfortunately something went wrong and my Apple TV became unresponsive. I've since unplugged it, plugged it back in, and now I see an iTunes icon on my TV screen. What should I do?You're not alone. Several people have reported that updating via the Apple TV's over-the-air mechanism caused similar unanticipated results. As I write this, Apple has pulled the update. Second- and third-generation Apple TVs running version 5.3 of the operating system report that they're up to date.But for you, that ship has sailed. So, let's see what we can do to put things right.The pictogram you see on your TV screen is telling you that you have to restore the Apple TV through iTunes. You may need to do this because the update simply didn'