Okay, I just noticed a MAJOR problem with iPhoto faces. After spending days working on my tags, all of a sudden I've noticed several of them missing and merged with other tags that they really shouldn't be merged with. For instance, all of the tags of my niece now seem to be merged with my nephew's tag (i.e., all of her faces are tagged with his, and her face isn't anywhere to be seen). What's more, all of the tags that I've assigned to my son now seem to be assigned to me. Now, I don't mind fixing some issues, but I've got nearly 3000 pictures of my son! I didn't notice this until I imported new pictures from a camera today. Very frustrated by this, anyone else have any similar problems?