I have a Scientific Atlanta 8300HD DVR thru Time Warner. It is programmed to record all episodes of about 25 programs per week. The problem is randomly drops some of the records on a consistant basis. For example I have it set up to record all episodes of NCIS but when I check it for the following week NCIS is not set to record. I have replaced the DVR several times but to no avail. Does anyone else have this problem?