I was talking to the rep here in Australia for the Mamiya Zd and other Mamiya products. This can be reset and checked with each lens. I have not had a problem with my ZD and got the unit in April. I have tried the Raw Processor and think it has great potential with this camera. I have sent them some Raw files with a Macbeth chart so they can create better profiles.
I agree with you that the software is good and fast enough, maybe the interface could be refined and still it's pretty good job for being the first version. As for the lenses, with my first body, all the lenses where out of focus with AF, now that I have the second body it occurs basically with the 55-110, the other ones seem to be fine. We made a lot of tests in the store and arrived to the conclusion that it was a problem of this especific lens. The strange thing is that we tried a brand new 55-110 and it had the same problem while with other new lenses there was no problem at all. Anyway, I ended up sending this lens to the services, I'm keeping my hopes. A part from this I'm very happy with the camera.