I have a batch of about 100 jpgs that seem to be corrupted in some way, since only 4/5ths appears. The thumbnail still appears, but I know that is separate from the main file. I assumed they were lost. However, what gives me pause is that when I open all the photos at the same time in Preview and use Contact Sheet view, the images are briefly all there. Then, in half a second 4/5ths of the image disappears again and I am back to the same corrupted image. My question is, does anyone know if the images appearing intact in Preview's Contact Sheet view is reason for hope? Or is that tied to the thumbnail file and I should lose all hope?