I have used Photobucket for several years and never heard anything like it.
After you've uploaded the pictures, try them out here with preview reply. Sometimes, for unknown reasons, some pictures are too big?? or something??, and the page on my screen "explode" horizontally, (which is annoying, but it also may be my computer, who knows)

When you copy your links to the pictures , it is the lowest one in GET LINKS.