All iPhoto events appear empty in "Event" view

Question

When I view my iPhoto 11 library by "Events", I get the usual listing of all my events, and I am able to scroll through the preview pictures at this level within the individual small Event icon. The key photo shows as normal.  However, if I double click on an event, the event comes up but without any photos showing, not even an empty grey window frame for each photo.  The name of the event shows correctly but on the top right corner it simply says NO PHOTOS.
Now the strange thing is that if I view the library by "Photos" or "Faces" or via Albums etc, I see all my photos and they all appear to be in their corresponding events as normal.  I can even right click on one of my photos and click "Show Event" and then the correct event comes up with all the photos showing.  But if I then go back to "All Events", I will see all the events but if I select one (even one I have just viewed), it will then say NO PHOTOS.
I have deleted the plist files (included the "locked" ones) from both iPhoto and Aperture but this doesn't resolve the problem.  I've also done a "Repair Permissions", "Rebuild Thumbnails" and "Rebuild Database" from the iPhoto First Aid menu (Opt-Cmd Click when opening iPhoto) and none of these have fixed the problem!  
I just recently started using Aperture to view the same Library and I have no problem viewing the "Projects" (which is the same as Events in iPhoto) in the normal way.  I have a feeling that this problem started only when I first opened the iPhoto library in Aperture.
Any ideas?

Answer 1

You don't need to purchase iPLM to use it to rebuild the library.  But try this first:  apply the two fixes below in order as needed: 
Fix #1
Launch iPhoto with the Command+Option keys held down and rebuild the library.
Since only one option can be run at a time start with Option #3, followed by #4 and then #1 as needed.
Fix #2
Using iPhoto Library Manager  to Rebuild Your iPhoto Library
1 - download iPhoto Library Manager and launch.
2 - click on the Add Library button, navigate to your Home/Pictures folder and select your iPhoto Library folder.
3 - Now that the library is listed in the left hand pane of iPLM, click on your library and go to the File ➙ Rebuild Library menu option.
4 - In the next  window name the new library and select the location you want it to be placed.
5 - Click on the Create button.
Note: This creates a new library based on the LIbraryData.xml file in the library and will recover Events, Albums, keywords, titles and comments.  However, books, calendars, cards and slideshows will be lost. The original library will be left untouched for further attempts at fixing the problem or in case the rebuilt library is not satisfactory.
OT