I have added photos to a timeline. When I play them back they do so properly. Elsewhere on the timeline, I moved a film portion of my movie too far and pressed undo, which fixed my error just fine. But now my first photo (1 of 5) on my timeline is filled in bright red instead of a thumbnail of the photo. So far, it plays back fine, but the thumbnail is bright red. What does this change signify?
roxylee