With a little luck, perhaps it finally supports gapless playback of Flac files? (Or even mp3s?) I haven't updated mine yet - it isn't connected to a network at present.
I emailed this request to Marantz nearly 2 weeks ago, and got a polite reply saying that it provided them with extra evidence for their QA team that gapless playback was in demand by their customers. They hoped something would be done, but didn't make any promises or give a time frame...
Bluto