Broken/Missing art...

What happened to these art pieces? All I get is a white background with the text "Gone...":

http://www.swagonline.net/user/390/gallery

Please fix it, reupload the art, or something. It's really bothering me, partly because I wanted to view them, and partly because I don't like errors being so obviously noticeable. There's even one on the 1st page of the main Gallery.