This morning Firefox would not start at all. The problem seemed to be with the 'Flash Video Downloader' but just to start with a clean slate I uninstalled Firefox and installed version 4.0. I went to the Apple website to look at some movie trailers but the video would not play. The site loads quickly and I can move about on the site. I got a "waiting for video" screen but nothing else. I installed QuickTime 7.6.9 but the problem still continued. If I use IE 8.0 everything is fine. I can open a video on my computer in the QuickTime Player and it plays well. Any thoughts?