I've had absolutely no issues with mine for the last year or so..
Original firmware and generally only format to make space on a card.
This thing is fantastic.
I typically run v3 digi into 7+8 to keep 5+6 free for analog inputs.
Monitoring the spdif input (toggle MIX MON and DIN MON) along with other channels works fine - but I can't solo the spdif this way.
Its an inconvenience I currently work around using the v3's analog output into a mini headphone amp.
Unless I'm missing something..?
Funny enough, I record a 20-piece jazz orchestra every second week and I got them dialed in - now all I use is one pair of mics clamped by a 2-channel snake I installed in the sweet spot for that gig.
These guys sound fantastic - wildly dynamic and they blast out at 110db routinely with no amplification and the tapes turn out just excellent!
The biggest band needs the least set up