I created a bunch of .mov files using iMovie and they play just fine on my MacBook Pro. I copied them across the network to my MacPro and they play fine. However, I need to get them onto a memory stick and get them off to my customer but only 2 out of the 5 will copy over to the memory stick and play from there. They copy over OK but unlike the working 2 there is no preview and when I launch them I get "An invalid public movie atom was found in the movie" or this is not a valid Movie. I am trying to launch in Quicktime. Funny thing is I have converted to DivX and still get the same problem. Any help would be gratly appreciated