I sent the Phantom II Vision out for a flight, and shot about 15 minutes of video. With battery running low, I returned to base and swapped in a fresh battery - then sent it out again. None of the video or still photos I *thought* that I shot on that second battery were stored on the memory card. It's a 32Gb card with about 30Gb free, so it's not a storage problem. Has anybody else seen this happen?