Many of our customers (and many, many other TiVo users) have been reporting problems with some recent versions of the DirecTV TiVo OS. There are two sets of problems, affecting two types of models currently.
For the standard definition DirecTV TiVos (includes all RCA and Samsung models, and Hughes and Philips models that have USB on the back, and the DirecTV R10): Units with 6.3e have been rebooting. This problem seems to be related to using the “standby” mode on the unit, and is greatly, if not completely, alleviated by not using “standby” anymore. “Standby” is a mode where the TiVo just cuts its video output – it’s not saving any power or turning the unit off in any way. So there’s really no advantage to using “standby” unless you have a TV with only one video input and you need to pass other video through the TiVo.
For the high definition (HD) DirecTV HR10-250: This unit has seen a lot of rebooting in the past few weeks – almost always with OS versions 6.3d and earlier. In this case, 6.3e seems to solve the problems. To make sure you get the latest OS version, you need your phone line plugged into the TiVo so that it can get authorized for the download. Also, experiences are showing that rebooting is generally happening during CBS shows for some reason, likely related to guide data problems. A “clear and delete guide data” will often fix the problem, at least temporarily. But the best answer is to get the latest OS version for the HR10.