This question already has an answer here:
- Why is my profile image different? 3 answers
My gravatar has been since I joined in 2009
and has now changed (where not cached) to
Why? I have not changed anything and it changed whilst I was just browsing
the other questions are not answering this case. The gravatar was the same in small and large mode so not gravatar issue.
It seems to be all sites not just Area 51