Ever since the new login format on MUO, I don’t see my pic on when I comment or post something…Am I logging in correctly?
Generally they come from http://gravatar.com . Make sure you have one assigned to your email address.
This is fairly common, but mostly has to do with what method you use to login. Changing the profile picture is on the list of things to implement still (I think), but not high on the list of things to do for now. I'm not sure which login method is used in order to have a profile pic as of now.