The older OS may not be able to read the thumbnail data stored in the file. I was trying to do some quick research on that but couldn't find the right kind of info. I'm guessing...but that is my best guess on why he can't see the change.
and lizza, it can be a little difficult to tell when Atom is joking but not in this case. You'll get used to it and probably enjoy it. I know I do!!
