Last weekend was my wosrt nightmare. I lost a memory card from a wedding. Today, I shock off all the guilt, went out and shot another wedding. 1920's themed. I was VERY happy with the images. I felt like I was on my game. Now, I am trying to open the images and I can't. I ahve been having issues opening the nef files and coverted one to a tiff and jpeg. both came out the same. They are all showing up like completely overexposed images (almost completely white) and I have no idea what is going on. These were shot with a new Nikon D90. I shot images this morning with the same camera and no issues. The thumbnails look fine. The histogram on the camera doesnt show this. What is going on?