I use Mozilla Firefox, and recently a few threads for mods and other stuff doesn't load in pictures, it loads in this instead of the photos. Is something wrong with my browser, I tried running Firefox without any add-ons and it still showed the same thing.
I've had this same problem on some websites as well and I've wondered why. Maybe someone else will know. I'll try to figure something out if I have time today, if I figure out how to fix it, I'll leave my solution here.