My v1 started doing this. Every second or third startup it gave me a memory card fail or something.
I thought fair enough I was an early adopter (probably one of the first few) so it's like two years old now.
Got myself a SanDisk high endurance 64gb, updated the firmware and formatted the card on the PC and in the cam after it updated the firmware.
Now it asks me to format the card every second or third startup which leads me to believe it's more like a hardware glitch.
Anyway I just unplug and re-plug the cigarette plug and it's starts up and records as normal but it takes a few goes usually.