If you drag and drop an image into a Ponder question, the permissions default to only visible by the author, which seems counter intuitive. It should follow the logic in D10131 which is that any user that can view the object can view files dropped there. It makes drag and dropping a file into a ponder question very counter intuitive, because it looks like it uploaded fine, but only you can see it.
Sample ponder question: Q94: This is a ponder file upload permission test
The uploaded file:is set to be only visible by me, but should be visible to all users (or perhaps whatever the visibility of the Ponder application is. )