Over the past week or so I've started picking up the occasional audio drop-out while watching DVDs on my Blu-ray player. It's literally for the barest fraction of a second, and doesn't seem to happen on all DVDs. On BDs, the audio is perfect. Has anyone else experienced a similar issue? I'm currently connected to the AV receiver via optical, but am going to connect rather via a coaxial cable when I next feel like crawling behind the cabinet to see if this makes any difference.