I have been shooting with the 54LV for a little bit now, and one thing is very clear: AE mode gives me consistently underexposed photos. I generally convert the files to DNG in eXposure, and then edit them in lightroom 2.0. In almost every photo, I have to bring the exposure up 1 to 1.5 stops. The files handle this extremely well, but it does give some color and luminance noise in the deep shadows. And if this is the "natural" state of these files, it would mean the real ISO of the back is 25 (or even ISO 18.75, which is 1.5 stops slower).
I am wondering if this is an aspect of the back, the camera, some sort of miscommunication between the back and the camera, or what have you. The camera seems to expose properly for film, though I have only shot negative film so far, so the latitude might be covering any errors.
If other users do experience this, is there a way to deal with it other than simply using exposure compensation?