Swing by PlagiarismToday.com and read this article by Jonathan Bailey: Artists Express Concerns Over Photobucket.
Jonathan, with the help of artist Sandi Baker, has started a petition to help convince Photobucket to revise its services to help protect artists' copyrights.
Many Deviant artists' work has been reposted on Photobucket. Do a search on Photobucket.com for your deviantart user name to see if your work has been stolen. If you find your work there, follow the guidelines posted here to have it removed: Photobucket Copyright Information. Try searching for titles as well, since often the artist's name is removed from the file. If you find your work posted in a gallery, be sure to check out