Suddenly, when moving to Develop, the image changes in inconsistant ways before any adjustments have been made. Usually rotates 90 degrees left and distorts/stretches to fill the image area. Sometimes it does not rotate but image is cropped so that a vertical is cropped to horizontal or if horizontal it is stretched. The image always is made darker by about a stop, but there is no indication of these changes in the Develop controls. When switching back to Library mode, the image is again a uncropped vertical, but one stop darker. Tried rebooting computer, but no change -Help please!