I listen to most of my music (FLAC format) using a Synology DiskStation as my music library. I've converted HUNDREDs of CDs to FLAC files, and to date haven't had a problem listening to any of them. Recently I converted the King Crimson 'Radical Action to Unseat the Hold of Monkey Mind' album to FLAC files, and my SONOS won't play them... I continually get the ' the connection to //DiskStation/[...] was lost.' message. It then moves to the next song, tries to play it, and displays the same error message. I was able to listen to the FLAC files successfully with another player (Cog) on my Mac, so I know they were converted successfully. I then reconverted the FLAC files to the m4a format (ALAC), and the SONOS player was able to play these successfully. Has anyone else had similar problems with specific FLAC files?