I think you've already answered your own question. I've had intermittent lock-up and rebooting issues, and when I posted asking about it, one of the first questions I was asked was to post my signal strengths. If the software is properly written, the OS should not lock up or spontaneously reboot just because the signal is weak. Does this mean that people in areas where rain fade is an issue should expect to have their boxes freeze or reboot? I've never had this problem with my TiVos.