Well if you have a corrupted JPEG, how do you get it back?
- http://thelawlers.com/Blognosticator/?p=795 points out that Adobe Photoshop has a built in recovery application. So if you have something that doesn't open in Mac Preview, try to load it in Adobe Photoshop. I tried this and although the image as distorted (it was shifted over, it did the recovery!). Then a little copy and paste to make it look OK and voila it returns.
- There are for charge programs that try to do the same thing.