Just for your information:
I've got a brandnew DVR 104, it came with firmware 1.3.
My experience: It's still causing troubles when using DMA transfer mode. My first burning attempts resulted in two coasters. As it has been told here before, with PIO 4 mode you're on the safe side.
Yesterday I upgraded to firmware 1.31 (downloaded from farzeno site), but lacking dvd-r discs wasn't able to test it so far.
Billie
P.S.
@Monkey Wrench,
well, I don't desperately need the 1.31 RPC-1 firmware but would still appreciate if you uploaded it, just in case I'd like to have a region free device.