I noticed some crosstalk between inputs recently. Switching off the TV, whose audio out is connected to the AVR300's AV input and was currently selected, while leaving both the AVR300 and the DVD recorder on, I could hear a thin, crackly but distinct sound coming from the DVD recorder's audio out (connected to the digital optical PVR input). I switched off the DVD recorder and it stopped, so that was clearly the source. Volume was set around 65dB. However, it's not entirely reproducible. After changing the input to anything else then back to AV it stops, sometimes. It seems to me it should not be happening. Has anyone else noticed this?