Mine rarely, if ever, appears in the answer box when I'm replying to a post and very rarely in the latest posts box. It's ok and visibly when I look back at posts I've contributed to.
I think it's a glitch in AB, as I've checked the Gravatar site. :(
The new site requires a lot more scrolling, and in doing so you accidentally hit the deactivate avatar button. You still see it in your profile and answer box, but it doesn't appear with your answers.
Sorry, we can't find any related questions. Try using the search bar at the top of the page to search for some keywords, or choose a topic and submit your own question.