Canon S100 'unidentified images'
I havehear have been a canon powershot user for 12 years and this has happened to me too a few times. Once or twice I managed to recover a portion of a corrupt image file using GraphicsConverter (on a Mac). But in the other casewatched images remained broken. My guess is that you will not be able to fix these files, unfortunately. If you come up with a way please post what you did so I can learn.