Thumbnails of psd images sometimes do not update after edit

Question

After scanning a bunch of negatives I decided to add the images to iPhoto in the psd format, which I wanted to keep. In iPhoto I have one roll for each film roll. I have iPhoto preferences set so that I edit in PSE. On some rolls after I edit and go to the iPhoto window and then single click on the thumbnail, the thumbnail changes to the edited version, as I would expect. However on other rolls when I repeat this, the thumbnail doesn't change to the edited version. When I double click I do get the last edited version of the image. (Also true if I edit in the Main Window.)
In PSE file saving preferences I have: On First Save= Save Over Current File. Also Max PSD file compaibility = Always.
Anyone have any idea as to what is going on. Thanks,
Owen

Answer 1

How are you editing those psd files? With Photoshop? If so then here's the correct way to use PS with iPhoto:
Using Photoshop (or Photoshop Elements) as Your Editor of Choice in iPhoto.
1 - select Photoshop as your editor of choice in iPhoto's General Preference Section's under the "Edit photo:" menu.
2 - double click on the thumbnail in iPhoto to open it in Photoshop. When you're finished editing click on the Save button. If you immediately get the JPEG Options window make your selection (Baseline standard seems to be the most compatible jpeg format) and click on the OK button. Your done.
3 - however, if you get the navigation window that indicates that PS wants to save it as a PS formatted file. You'll need to either select JPEG from the menu and save (top image) or click on the desktop in the Navigation window (bottom image) and save it to the desktop for importing as a new photo.
This method will let iPhoto know that the photo has been editied and will update the thumbnail file to reflect the edit..
NOTE: With Photoshop Elements 6 the Saving File preferences should be configured: "On First Save: Save Over Current File". Also I suggest the Maximize PSD File Compatabilty be set to Always.
If you want to use both iPhoto's editing mode and PS without having to go back and forth to the Preference pane, once you've selected PS as your editor of choice, reset the Preferences back to "Open in main window". That will let you either edit in iPhoto (double click on the thumbnail) or in PS (Control-click on the thumbnail and seledt "Edit in external editor" in the Contextual menu). This way you get the best of both worlds
2 - double click on the thumbnail in iPhoto to open it in Photoshop. When you're finished editing click on the Save button. If you immediately get the JPEG Options window make your selection (Baseline standard seems to be the most compatible jpeg format) and click on the OK button. Your done.
3 - however, if you get the navigation window that indicates that PS wants to save it as a PS formatted file. You'll need to either select JPEG from the menu and save (top image) or click on the desktop in the Navigation window (bottom image) and save it to the desktop for importing as a new photo.
This method will let iPhoto know that the photo has been editied and will update the thumbnail file to reflect the edit..