Apologies for raising something that, no doubt has been talked to death before, but... I've spend about 12 hours working on an iMovie9 project which has now decided to throw a tantrum. I imported a number of AVI files which iMovie allowed me to import, edit, soundtrack, review etc. but, for some reason, today it won't display any of the visuals in the 'play' window or allow editing/playing anything in either of the editing windows (including photographs which are simple jpeg files). I know there's an issue with AVI files but I assumed I could address this when finishing/finalising the project. Have I wasted 12 hours of my life? Ideas welcome.