I am a Canon shooter but received some raw Nikon files from a fellow photographer. We've done this before and I've had no problems with his files - well, we have done this a number of times but before I used LR 4 (i.e., in LR 3 and before). With this batch, when I start cropping, the image gets stretched vertically, but is fine when I hit enter to commit the crop. The preview, BTW, always looks fine. It's annoying; what can I do to get this resolved? Thanks.
Dilip