For almost a year, I have been constantly facing this error: “56 photos have been found in the iPhoto library that were not imported. Do you want to recover them.” The dialog has two choices, No and Yes. No matter what I do, it does not do anything useful or harmful.
It was just a minor inconvenience. I finally decided to get rid of the message. Here is the solution.
Open the iPhoto Library (by right clicking on it and selecting “Show Contents”.) Then find the folder called Import. Move it out of there.
Mine did not have any real pictures in it, just a bunch of place holder folders. I deleted them all. And the problem is gone.
Did this work for you? Please let me know in the comments.