Hello! When trying to view the fullscreen video of a short movie I made on imovie, the "fullscreen" remains black. The movie only 'starts" when I press the spacebar, and even then, all I hear is the sound without image. Only after the movie is finished will I be able to exit the fullscreen (esc does not work...) Do you know what is happening? I can't watch it fullscreen, I can't upload it on youtube or iDVD (disabled), yet my other movies are fine to burn (fullscreen mode still a problem even for them though). Thankyou! Lily PS. my imac is only 2 weeks old!