I have a problem with a .wmv file. When I play it in QuickTime or VLC, I hear audio only, but no video. I have the latest Flip4Mac plugin and have no problems playing other .wmv files. The first time I played the file in QuickTime, as was directed to the Apple QuickTime components web site (http://www.apple.com/quicktime/resources/components.html?os=OSX&ctype=696d6463&csubtype=4d535332) because "Additional software is required by QuickTime to playback this media...". But I see no plugin on that web site that would be applicable. I would be grateful for any ideas as I want to purchase educational videos from this vendor, but can not if their files won't work on a Mac. The 43MB file can be downloaded here for testing: http://files.me.com/pschannong/x20p20 I run 10.5.6 on an Intel Mac.