As anyone can see by going through past threads, a lot of the images aren't being displayed because Photobucket has decided to charge its users to "hotlink" from other forums/websites. No fault to them, I guess you gotta make money somehow, but for those who have build threads or informative threads, it would be a good service to reupload your images to alternative sites.
http://www.freeimagehosting.net/
This one is about the only one I could find which allows hotlinking and keeps images forever. Imgur erases images if they haven't been viewed for a while, along with other sites. Flickr doesn't allow for hotlinking.
I suggest all the moderators to make an announcement in their own sub-forums.