One of the benefits of .dng is that adjustments are written into the actual file as opposed to a sidecar. I made a change to a pic in LR, exported it as .dng, and then opened it in CR with my adjustments intact. But then shouldn't I also see my adjustments if I import it into Aperture? Why doesn't A3 see those changes? And further, is there a way to export a .dng from A3 that I'm missing? Shouldn't I be able to, in the same way, make changes to a .dng within A3 and move that raw file into some other app or to someone else so they can work on it? Isn't this the whole point of .dng? So why doesn't Apple support this?