After years of using iMovie without any problems, having upgraded to Mountain Lion and the latest version of iMovie, v9.0.9, that happy state no longer exists. If I try to Share>Export Movie, the progress drop down box appears, but there is no progress, and iMovie quits shortly after. The same if I try to Share to iTunes or the media browser. Sharing to Quicktime or Finalizing the Project work fine. I've looked at numerous Google results but not come across a definitive answer. Anyone know of one?