Ugh - this is my second "help" email in the last week - everything seems to be going wrong at once. I took some photos today on a SanDisk Extreme III 4GB card. Looked at the photos in the LCD screen afterwards, deleted one or two. Looked again. All seemed fine. Just put the card into my card reader to transfer images to Mac and all of todays shots are gone!!! Everything else from last week still on card. Card not full (400 plus shots left) What should I do?? Buy one of those recovery programs for $30??? Help!!! UPDATE: tried all of the great advice given (try USB cord, check all sub files etc and just couldn't figure it out) so downloaded a free trial rescue program and it worked so paid for the full package to get my images back - it worked!!! Will post image below - THANK YOU EVERYONE WHO REPLIED!!!!