Can you confirm this Faces bug in iPhoto '11?

Question

I have created an Smart Album "unnamed faces" which should show all photos with "unnamed" faces. It shows about 2,500 of my about 24,000 photos. Some of these have been added recently, some are in the library since the old iPhoto '08 days. I see that some of them often "forget" that I have already rotated them. Even the face frames stay unrotated and are sometimes converted from squares to rectangles. But all this doesn't really matter.
This is what I see as a bug: When I edit such a photo in the Smart Album, it e.g. shows one named face and "1 unnamed". I then rotate the image to have it in the desired portrait or landscape view, remove the wrong, rectangled and named face frame and name the unnamed, correctly placed square face frame with the desired person's name.
Whatever I do next, photos treated this way still tell me they would have 1 named and 1 unnamed face frame. I only see the named, square frame, because I have deleted the old, wrong and rectangled frame before.
Even more strange: When I set the Smart Album parameters like this:
it shows these "damaged" images, which optically only have one named face frame left. The (translated) settings are: "All" conditions: "Face is unnamed" && "Face is not unnamed".
This is really weird and I have no idea how to fix it except deleting and re-importing the images.
PS: Yes, I have already even tried all options of iPhoto Library Manager without success for this issue.

Answer 1

Back to your original Library:
Download iPhoto Library Manager and use its rebuild function. (In Library Manager it's the FIle -> Rebuild command)
This will create an entirely new library. It will then copy (or try to) your photos and all the associated metadata and versions to this new Library, and arrange it as close as it can to what you had in the damaged Library. It does this based on information it finds in the iPhoto sharing mechanism - but that means that things not shared won't be there, so no slideshows, books or calendars, for instance - but it should get all your events, albums and keywords, faces and places 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.