For albums, the image_src link points to an HTML file instead of an image file, causing thumbnail previews to fail.

Facebook (and other sites) rely on the image_src link when generating the "share" preview thumbnails on sites that use Javascript to load images.  This link must be an image to work properly.  It works great when you share an image page, e.g. http://imgur.com/GwQyN, the image_src link is http://i.imgur.com/GwQyN.jpg.  But on albums, say http://imgur.com/a/2GujB, the image_src link points incorrectly to http://imgur.com/GwQyN which is HTML.  It would be great if this could be fixed so that album previews show up with thumbnails!