On the Image Management page, check that you have Show images in: "All Folders" selected at upper left. Also, make sure the Search box directly to the right of that filter is cleared.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .