I have a simple app that plays video with the MediaElement control, but it only appears to work on some machines.

It works on the machine I use to develop, but 2 out of the other 3 machines I tried it on resulted in a black area where the video should be.

Is this a known problem with the MediaElement control in WPF? I've made sure that the relevant codecs for the files are installed on each machine but no success.