I'm using a 12" G4 Powerbook with OS 10.4.10. Using iPhoto 7.0.2 (341) I've now had two separate iPhoto libraries where photos were either corrupted or lost. In the first instance I noticed a problem trying to do a Retrospect Back-up and the procedure simply hung the program. Then when I tried to copy the whole library via the finder, the copy was interrupted with the message: "The Finder cannot complete the operation because some data in "IMG_0416.JPG" could not be read or written (Error code -36)" When I went into the library and tried to export the picture via the file menu, I was unable to do so. When I dragged the photo to the desktop, it seemed to go across but when I opened it in preview it was a partial photo and garbage. When I tried to duplicate the picture in iPhoto, I was unable to do so. I ascertained that there were close to 200 photos from several uploads that I couldn't duplicate. This was from uploads back in March of this year. In this instance, I did have a prior version of the library backed-up. I deleted the photos I couldn't duplicate and then imported versions from the prior back-up. It seemed to fix the problem, at this point. - - In the second instance, a different library, the photos simply disappeared from two separate imports. For import #1 (about 30 photos), the thumbnails were still there but when I double-clicked on the thumbnail, I got a greyed-out image with a exclamation point. In import #2 (about 70 photos), there were no thumbnails visible, just a faint outline where the photo should have been. Double-clicking on the thumb-outline got the same greyed-out image. These were recent imports, 2 and 1 weeks ago. In both instances, I had gone in and corrected many of the photos and deleted others -- the program seemed to be working just fine until the photos disappeared. The photos were completely gone. Import #1 was available as a back-up. Import #2 is lost and gone. - - - - Can any one tell me what's up here? I'm extremely nervous about using iPhoto at this point -- it seems that at any time my work could simply disappear. Can any one suggest what's wrong?