httpv://www.youtube.com/watch?v=hp6TkzuKfDE&feature=player_detailpage

This is an old post that has been reposted, but if you’re going to master Facebook, you have to be prepared to watch a lot of this type of video — Facebook is constantly in a state of flux and they can and they will and they do change things in a moment’s notice. These changes may affect things that you’ve built in Facebook, but that won’t make any difference. To them. :-D