Photobucket may have been doing some maintenance which tends to affect access unevenly.You can look here if it matters to you, but I think they remove the entry once maintenance is complete so it's not much use for historical diagnosis.

There was a panic, with demands for host changes, on a community I watch, a week or so ago, when all it needed was half-an-hour's patience. Far more "Why can't I see them?" comments than thanks when they could. Bah to human nature.