I record CBS Sunday Morning every week. Turned the tube on a little earlier this afternoon to watch it. All of my recordings of other shows were gone, probably between 40-60 hours. The list showed 617 recordings of CBSSM, all today. Clicked on it and it showed a 39 minute partial. Watched that and everything was normal. Must have taken 5 minutes to delete all of them. There was a thunderstorm in the area about 5:00 AM, but no power outage or spike and all electronics are OK. Did this on both DVR's. Really chaps my butt.