As far as I know, I haven't had to have any comments approved. It is just one of those notifications: Likes, quotes, mentions, etc. But now there is a new category in that drop down notification menu and says picture comments need approval or something to that effect. I just noticed it in the list. And wondered, something new?
Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.