Your URL's are screwed up. It's not a matter of the pics not being available on photobucket. Hover your mouse over the link and you can see it's truncating the URLs for the photos.
Hmmm, I'm just not sure what's going on. I copied the links just like the other pics. Been looking at the URL's of the pics that did compared to didn't work and they all look similar to have the same set-up.