The fact we use Gravatar for user images doesn't seem to be mentioned anywhere during the account creation process. Also, while the image is visually part of the profile, Edit profile makes no mention of it either - the actual place to allow showing a Gravatar is under Privacy in Preferences. This is a bit confusing, so we should make more clear that the user can do that, either by allowing setting it as part of account creation or maybe even by moving this setting to the Edit profile page.