whs

Understand what you are saying. This phenomenon I have never seen before - and I process a lot of pictures on 4 Vista systems from 3 cameras. I am not certain whether that is a problem with Vista or with the camera. There must be something in the "Properties" of those pictures that generates this effect. Maybe you can compare the properties of the new pictures and the old pictures that hide them and see whether there is something that would give us a clue.