If it is working on your end then we are fine. I have noticed that browsers that have 'safe search' enabled (like my work network has) that the safe search tries to filter out image search. I have had it before that some images on imgur are considered unsafe and are filtered out by the safe search.
when I go to the box with a x and look at properties, grab the link on imgur and then go to another tab in my browser and paste that link then I can pull up the picture just fine. So your pictures are fine, problem must be on our filter system at work.
Sorry about false alarm and keep posting those awesome pictures