Sadly, there's nothing you personally can do to fix the "Please Update" images - we'd need to update our PokéCommunity Photobucket account to premium :(
We're not going to bother with that because in all modern and upcoming themes, graphics are stored on our server rather than on third-party sites. If your favorite theme has been broken because of Photobucket bs, all I can really advise is for you to pick a different one for now and wait for us to recreate the old themes once the UI Update comes around.