IPhoto Thumbnail Discovery.....Now What?

Question

I have been struggling with trying to understand why, in many of my Events, not all, the thumbnails show up with the grey exclamation mark when enlarged. After studying the iPhoto Library, I discovered that all of the Events that were producing this problem had been renamed from the default name "Roll # in the information pane (in iPhoto Application) after importing from the camera. iPhoto Library appears to create a new folder called "iPhoto Originals" where it places these events which seems to "orphan" these photos.
I rebuilt the photo library with all options including "Recover orphaned photos in the iPhoto Library folder". It asked "do you want to import orphaned photo", I said yes. All of photos in the "iPhoto Originals" folder were imported into a new default Event named by the oldest photo date. It also created a new Album called Recovered Photos.
The Events referencing the "orphaned" photos still exist with the same problem. How can I recreate the original Events with the newly imported original photos with out creating the original problem?
• Should I delete the photos from orphaned Events and then move the recovered photos into the that Event?
• Should I delete the orphaned Event entirely, create a New Event and then move the recovered photos into the that Event?
• Most importantly, how can this condition be avoided in the future. iPhoto Help suggest you can rename an event in the information pane, however, as I have discovered this appears to "orphan" the Event.
Thanks in advance for suggestions

Answer 1

Download iPhoto Library Manager and use its rebuild function. This will create a new library based on data in the albumdata.xml file. Not everything will be brought over - no slideshows, books or calendars, for instance - but it should get all your albums and keywords back.
Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one.
As to prevention: Do you have a particular naming scheme? Does that use any ? / * type characters?
Regards
TD