Also go into 'View your profile' to check that it's still enabled there.
Some AB members have reported that their avatars don't show unless they've given them a 'G' rating on the Gravatar website. (Gravatar uses the US film classification system, where their 'G', for 'general' is the equivalent of our 'U', for 'universal'). However I can't actually recall ever being asked to give Animal a rating anyway!