I can't seem to get podcast motion pictures to work. For example, I tried to download and play the PBS Nature podcasts, available at this URL: http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=203180821 to the iPhone. However when I play them I only hear the sound, see a still standing image from the video, but the video is not playing. I have the same problem with any other podcasts I downloaded. Podcasts play just fine in iTunes on my Mac.