When I first started iMovie it wanted to import the clips from iPhoto. In the process of doing that it crashed. This was before I realized it already had an update. I updated it and started it again. It continued to import the clips but the ones it was apparently was working on are all screwed up and totally messed up the library. I want to have it start over and rebuild from scratch but I can't figure out how to get it to do it. Does anyone have any idea what I can delete, or any other option to get it to retry this?
For what it's worth, go into iPhoto and check your clips. Are they all in the same format, i.e. .MOV, or .MP4? I've seen my own iPhoto crash numerous times until I saw some of my clips in .AVI format and deleted them. Now iPhoto works much better.