I had the same problem, they couldn't reproduce it, but said they'd replace it anyways. Very good service in my case. Just have to get the right person.
jW
He did say that he would "note the issue" in case I have to come in again for it. Not sure if they will just let me wear them down on this. I almost flipped my lid the other day when I mashed the home button five times really really hard and it still would not wake. Another episode like that and I will be back at the bar I guess.