If you've been using an HDMI to DVI adapter to hook up your Apple TV, there's a chance you've been dealing with some annoying flickering on the boob tube since downloading the latest update to the device. Well, the end to your flashing screen woes is here: Apple's just let loose a follow up that promises to fix the flickering. Update 4.2.1 also addresses audio issues and a glitch that put the thing in a permanent slumber when it went to sleep. So there you have it -- now you won't have to miss even a split second of
