It could also be some funky formatting used by the camera -- which requires the image transfer software that came with the camera to work properly.Well, if the card reader on your printer works fine, but the one on your computer doesn't, I would almost guarantee that it's the reader on your printer. If you have another SD card I would try that, also if your computer is new enough and it's still covered by warranty sounds like a manufacturer's defect. Yeah, maybe someone will come by that knows more than I do.