I know what you are talking about. I have had nothing but problems with the bucket. The last time that I used it , it took me an hour to post a photo. Im now using another photo hosting program and now, no problems.
Say the picture is already in my photo album on fb. (where it has to be...)
click on it, when you are viewing it - under it there are tabs, one says options.
Click that and one of them is get link, copy that and paste it here in media. (the film strip if its a video or the pic frame if its a pic) I think your settings in fb has to be public...