After spending a morning making wonderful photographs with an empty film back. it was pointed out to me that the latch for the film magazine incorporated a nice reminder indicating whether the back was empty or loaded. I don't recall which was witch, red or silver, but my back is showing red all the time. Have I just gotten something out of synch? If this requires a trip to the Hasselblad Doctor I'll leive without it and be more careful. I actually have already adopted my own indicator: Reversing (blank side) the box end in the film reminder holder thingie on the back. Is there a quick fix? Which color is which? Thanks! Looks like I'll be keeping the 501cm/80mm for awhile longer.