imgur.com doesn't display some pics in certain formats

SFW ::: http://imgur.com/a/8GYt1#0 NSFW ::: http://imgur.com/a/6QPip#0

With HTTPS Everywhere enabled for imgur.com, the first image of the set displays. But whenever moving to the next image, the image displays for half a second and then disappears. Simply turning off the ruleset for imgur.com fixes the problem.

Version 2.2.1 on FF 15 on Kubuntu 12.04.