Just making sure there isn't some stupid little thing going on, I'm assuming I'll need to send this off to Phase/Mamiya for repair.
Shot one evening, everything working fine. Put the camera in the backpack. Next morning set it up on the tripod and the focal plane shutter is closed, and won't open. Normally when you take the back off, the mirror goes up and the shutter opens, doesn't happen. Mirror goes up fine, shutter stays close.
Needs to go in anyway because the AF is on the fritz, but was going to wait till after my next trip since I manually focus most of the time anyway.