I have a problem with my optical link from the SKY+ box. Periodically the sound swithes off completely for a few seconds. It is not my Pioneer Tuner and when I rewind on live pause the sound is there ok and plays back fine. It is really annoying - anyone else suffer this? PS: What is the RS 232 socket on the rear for? Surely it is not there just for the gnome???? Tks guys!