iPhoto 1.0: External Editing Application Does Not Open Photo

If you have selected an external editing application in iPhoto preferences, the application may not open the photo when you double-click it in iPhoto if you have changed the photo's filename in the Finder.
Symptom

Double-clicking a photo in iPhoto opens the external editing application, but the photo does not open inside that application.


Solution

This issue may be caused if you changed the photo's filename in the Finder. Change the filename back to the original to resolve the issue.
Published Date: Feb 18, 2012