My main HR10 (unhacked, stock HD) has been running v6.3b for a few weeks now. Under 6.3a, I experienced the audio drops on OTA Fox, ABC, and NBC stations, and then later began experienceing reboots. When 6.3b downloaded, the audio drop issue went away, but the reboots and freezes seemed to get worse. Now, all of a sudden, I've gone a couple of days now without a single reboot (haven't had to reset the 30 sec skip). The variables that I can think of are these: 1) I've watched several shows from Now Playing and then deleted them, thereby reducing the amount of the harddrive that is "full." 2) The guide has been updating - I mention this only because others have speculated corrupt guide data was causing the problems. Given that the freeze/reboot issues occurred with 6.3a and continued with 6.3b and now seems to be gone, I am now wondering if the problem was, in fact, related to guide data, and not the software version. Have any of you that were experiencing freezes and reboots noticed that the machine now seems to be operating as expected, without reboots?