I have just installed Aperture3 on my MacBookPro 10.6.2. I imported my iPhoto library to Aperture. I have hundreds of movies in Aperture from two Canon cameras. When I open iMovie, it correctly points to Aperture3 and begins to reference the movies in Aperture. One quarter of the way through this process, iMovie hangs and crashes. I tried several times, restarted and tried again. Crashes in exactly the same place. I reported this bug to Apple. 1) Probably not a good idea for anyone using iMovie to upgrade to Aperture3 until Apple fixes this. 2) Does anyone know how to start iMovie bypassing the automatic checking for new movies in Aperture? I have other movie projects I would like to work on.