There's prolly a stickie somewhere or other...I'm just too darn lazy to look. So..go back to photobucket and look for the code to that pic that has on both ends. Found it? Now click on [b]My Account[/b] at the very top left corner of this page, then click [b]Edit settings[/b] in the My profile section. (again it's on the left) Scroll down the page and hey presto! There it be. Copy and paste that link into that field BUT change the IMG to lowercase img (on both ends) Post yourself a private message to find if it works.....job done. And the result is..(waits in anticipation)...?
