I'm new to this forum, so hope I'm posting in the proper place. I've had Comcast DVR in the SF Bay Area(Concord/Clayton) for 3 weeks. This is a new feature for our local Comcast cable. Love the feature but they've had to give me 3 DVR boxes. Everything seems to be working properly now except that about 1/4 of the recordings are partial recordings. These DVR recordings can be analog or HDTV. They can occur at times when I'm not around so I know it's not me causing them. It can be an hour recording that turns out to be 51 minutes or a 2 hour recording that turns ou to be 45 minutes. I had this issue with the last 2 boxes. Anyone have this problem?