How many people have lost USB communication? The first Phantom I purchased wouldn't connect to a PC out-of-the-box (every computer I tried didn't even know something got plugged in). Got great customer service at Superstition Hobbies - they didn't hesitate to replace it. The new one connected perfectly, I was able to run all the cals, enable IOC and manual mode. But about 2 days later, I was showing off the RTH feature to a friend but didn't know at the time I had to flip the switch from GPS to Attitude mode to regain control. So I ended up frantically flipping all the wrong switches trying to take back control as I watched it try to land in a Mesquite tree. Wasn't pretty. Ended up dropping 12 feet to the ground. Plugging into the PC, I saw the ERR (Y accellerometer fail) message and after researching tried to unstick it my slapping the side of the craft. When I did this, the USB stopped functioning and now it behaves exactly like the first Phantom I got (no machine even recognizes it). Am I just unlucky or does this machine have a very fragile USB. Anyone have any idea what is actually breaking? Is it the NAZA-M or the "Versatile unit" (LED+USB board)? I hope the latter since that is a LOT cheaper to replace.