The problem I'm seeing (722k w/L685) is that cancel doesn't always work. And something else when my AV receiver is on (hdmi to tv does not go through receiver) I see the receiver go through three retrains to pick up audio ... well I call it a retrain, its actually picking up a signal, chooses the audio mode to be in, then resets, goes to another audio mode, and then when the picture finally comes on, the AV receiver has done a third blank/audio mode selection and then the audio starts.
when the 722k responds to a press of "cancel" to clear the channel/ad banner the process is much faster 1/2 to 1/3rd as long as when pressing cancel doesn't work .. and of course when cancel doesn't work.. I still find myself having pressed cancel a 2nd and 3rd time thinking the first attempt or two wasn't picked up...
its like the whole thing is an attempt by dish, to get the user so disgusted in attempting to clear the banner, fail at it nearly every time, so that you eventually give up trying any more. But then there are times when hitting cancel works nearly instantly.. no rhyme or reason.