I've plugged the audio output into my amp as I wanted to use the Dolby Prologic System from my Hifi rather than the virtual from the TV speakers. I set the TV speakers to off as described in the manual, but every time I put the TV into standby of turn off, the option is then reset back to default. Sony says that this is a "Feature"!! I see it as a bug with the software. Has anyone else come across this problem?