'Upgraded' the 320Gb HDDon my 9300T with a 1Tb WD10EVDS (specially chosen for it's AV qualities). Went OK, formatted fine. Even recorded something to it, no problem. Then, while paging through the channels (prog +/-), randomly at a switch from one channel to another it would seem to 'hesitate' or 'time out' waiting for something (with no picture or sound) for longer than normal and then the hummy would reboot. After the reboot, it would be at the previous channel, but when I page forward again, it would be OK, until I reach another random point, when it would reboot again. Tried everything I coould think of including reformatting it again, but the symptoms persisted. Replaced the original disc (by which time I had taken off the recordings), reformatted it, and all is well. No problems paging, no reboots. Anybody got any ideas why this might have been happening?