Since the firmware update to rectify the guide slowness was installed, I have had my main portal reboot while watching TV. This has happened to me twice. It never happened before the update. The last reboot was just before 6pm today. Looking at the installer tool info, it appears that account info got updated at this time. My other portal got updated at about 1am today, so if a reboot occurred on that portal it would gone unnoticed. Why are the updates happening on the other portal during prime time? Very frustrating to have things reboot while you are watching a program.