I have had reboot problems with a 722 since it was installed in December. It seems somewhat random though perhaps more frequenly when the DVR is in use (either playing or recording) but I am not certain. I have several programs or movies that have been recorded in 2 or more parts because "recording stopped due to STB reboot". I have contacted tech support via email a couple of times and provided additional information they requested. Tech support has indicated to me that it is a software problem and "they are working on it". They have offered to send a replacement at my option, however also indicated that since it is a software problem, it may reoccur even with a new box. The software on the unit is L448. At this point I have not decided to ask for a replacement.
Any one else with similar issues?