I'm using Mac OSX 10.4.11 and Safari Version 4.1.3 (4533.19.4. I'd try it on others browsers and OS's but I don't have copies of these pics on my HDD anymore so I don't want to risk losing them in the ether forever.
I noticed this earlier when editing a character but it seems like if I try to add an image to a Wiki article, it's just pauses in the loading screen forever. When I refresh the screen and try to add it again, the image is removed from my personal gallery, the character gallery, the series gallery and the franchise gallery. However, it still seems to be counted in the image count section of a gallery.