My wife got a new Droid 1 about a month ago. It' is her first smart phone and she is enjoying the features. Yesterday she was adding a contact, lots of battery left. The screen went black on her. The unit somehow shut itself down. It would not restart. I plugged in the charger but there was no response to that. I drove over to the Verizon store (we were about 5 minutes away). Suddenly the Droid powered itself back up again. The store clerk said it wwas because she had Advanced Task Killer running. I told him that he was dead wrong and not to insult me again. He replaced it with a new phone. Questions: What happened? If the phone had been rooted, would we have been warrantyless? Can Task Killer cause this?