Photobucket have updated their terms and conditions. If you have saved pics on Photobucket and are linking them to a forum they will not appear, Photobucket wants you to pay an annual subscription to do this.

My suggestion is to use a real free image hosting service, imgur.com is one that I use, there are others out there was well.

If you have photos shared on photobucket, I recommend you move them to a better and free service.