Today I imported RAW images I shot on the Canon 5d3 with the camera set to Add Cropping Information set to 4:5 ratio. Crop lines are displayed on the camera LCD but you see the full frame outside of the crop when review files. Alarmingly, when I imported them to LR 4.1 RC, the images appeared cropped to 4:5. I though ok, I'll just go to the crop tool and I will see that a crop has been applied and I'll remove it. Unfortunately, there was no file beyond the crop lines, it could not be removed as far as I could tell. I called Canon and they told me to try Digital Photo Professional, a program that I never pay attention to. Sure enough, the images were intact when viewed there. There appears to be a bug when LR 4.1 RC encounters the crop tag on the raw file.