Learned friends, Maybe this has been mentioned before but I don't think so. I've been following all the posts on the above software developments and I have been working <very> carefully on a largish project started in iMovie 2. I took advice from the list and renamed all my existing iMovie files as "iMovie2" and backed up the original project files (and even the media files - you guys/galls have got me so paranoid!) I had the basic edit done in iMovie2 but no titles/transitions etc. and I wanted to try using some of the new possibilities in iMovie 3. Here's what I found so far. I found as expected: 1) iMovie 3 loaded and ran slowly with the jumpy timeline and various irritating delays. Sometimes I wasn't sure it had noticed the last click action. Undos took FOREVER. It did the job OK eventually. 2) The updated project file could not now be read by iMovie 2 BUT I also found: Sitting in the Project folder was a new QuickTime file (the small 'dependent' type - not self contained) - filename as Project.mov It played the updated iMovie 3 edit with all the new titles etc. in QuickTime (I'm still on 5 Pro) I wasn't aware that iMovie 3 saved this way without even being asked. This could be useful - especially for the poor folks who went back to iMovie 2 but can't now read the project files. All may not be lost. Colin McDonald