Has anyone had issues with the buttons not responding on their i770R? Just dove 24 dives with the new i770r and came to love and hate it. It was very frustrating when it didn't respond at all during a dive or after in Dive mode. That also meant I could never get it out of Dive mode. Now that 24 hours has passed I was able to move up one menu item before it stopped. It's on firmware 1E.02. Thanks