looks like that original post is Sept '09 ~ could be numous reasons, photobucket and other sites limit the amount of space they give you for free ~ I have noticed that pics that are uploaded to this site are gone from '08 & '09 posts too, I would imagine to conserve space.
We are blessed, very few forums like this exist that allow us to use their webspace to upload our pics. Most make you host externally (like webshots, photo bucket, etc)