I have no idea if this will apply to anyone else, but I noticed the angryman gifs when I browsed the Picroda too (and the odd occasion when I browsed the AKB areas of the forum itself), and the problem -- for me -- was related to the Web Developer Add-on for Firefox. By default, the add-on has the "Disable Referrers" option enabled, which prompted the angryman gifs. Once I disabled that option, the images loaded properly.