iMovie 11 starts with a black screen. How can we make this a white screen? I want to make a movie that is a continuous loop. All images have white background.  When I make the movie with iMovie it starts and ends with a black background image.  This does not look good when the video loops.

How do we control the basic background in iMovie?
If there is an image with a white background at the start and end of the video, it should never export a black frame at either end.  (I've never seen it do that, and I've used iMovie '09 to edit hundreds of videos!)