To make your photos show up in a post, you have two choices:
1. Highlight the URL and then click the "Img" function button above your reply box.
2. Under each pic at PB, there are four selections, one will be for "Img" or "Image". Click on that and it will automatically copy the URL with the Image brackets in place, so when you post the photo will show.
These are image brackets around the URL: [ img ] photo URL, looks like http:// photobucket/folder and your username .jpg [/ img ] (no spaces, of course)