I put a couple of old movies on the Touchpad for an upcoming plane trip. A couple are .avi and one is an .mkv file. I tried them out with a demo copy of Kalemsoft media player and they worked fine. Then I added a .MP4 movie and now the others are not visible to the Touchpad! I can see them when I attach the TP to my PC and view the folders. They are all in the movie folder but the only one the TP (and the media player) sees is the .MP4. Thinking that might be the problem, I deleted the .MP4 file and the TP still doesn't see the others.