Has anyone else experienced audio issues with content delivered to their Series 3 over the internet? I can see the video but can not hear the audio from shows purchased from Amazon Unbox and videos delivered by Tivo to my messages. Audio and video from shows recorded via my cablecards play perfectly. I am using optical cable to connect the Series 3 to my AVR. The only way that the audio plays from Amazon Unbox purchases is when I switch the AVR audio connection from and optical cable to an analog cable. I can get the audio to play through the optical cable if I switch the audio settings on the Series 3 from Dolby Digital to Dolby Digital-PCM.