I get a similar issue. Any audio using a digital signal through hdmi or spdif pops intermittently and my receivers OSD flickers with each pop. It seems like there is an issue keeping a constant digital signal as it seems to be breaking up and re-initiating. This also happens when using the software to decode without bitstreaming but it is not as obvious as the receiver is not the main component in decoding. I am using an Auzentech X-Fi Hometheater HD as my soundcard bitstreaming through HDMI. It is unfortunate that this occurs as Splash has been my favourite player since their first release of Lite. It works great for all non digital audio signals though. Please fix this and hopefully add support for the Auzentech Hometheater HD for Splash BD.