Why in the world would the Uploaded Media folder be unpublished when I upload a image for a quiz?  Half way through, my students became somewhat frantic because instead of the image (that they needed to answer a question), they saw the image of a lock.  Of course, when I PREVIEWED the quiz, I had no trouble seeing the images, so this came as a complete surprise to me.  And I can use "student view" for a quiz before it's published, so I had no way of knowing.  This just seem like a bad choice as default.