When I play back video in HD quality over the wired LAN connection, the digital audio stream (SP/DIF) from the TV is not recognized by my audio amplifier. The video is rendered with H.264 codec and is fine on the screen. The audio is two channel (stereo, my audio amplifier accepts stereo only over its SP/DIF input, not 5.1). The sound from the build-in speakers of the TV is OK.

Strange enough, when I play back a video in DVD (HD) quality (mpeg-2 codec) from the same computer over the same LAN connection, the digital audio stream is passed correctly to my audio amplifier).

Has anybody the same experience? Can it be a bug in the TV software?