Hi I'm using iMovie 3.0.2 and here is my problem. First when I try and preview a transition I click my mouse on the 'Preview' button which lights up for a couple of seconds and then just reverts back to its normal state, without showing me the transition preview. Secondly, when I have put a transition in the timeline, the movie plays smoothly until it reaches the transition and then sort of stumbles for a couple of frames before moving onto the next clip. I have just upgraded from iMovie 2 and never had these problems. Help me, I'm going mad ! Kind regards Neil