But the difference is that Photoshop is an image editor. While it's still not great, I would almost expect it there. But F-spot is not supposed to be changing my images at all. What I found out is that it does not, as long as you don't allow writing tags to files. By enabling that, I destroyed a lot of data. Fortunately, the image data and all the essential EXIF data is intact. Those are most important.