Ok this is weird... did anyone else randomly lose their GitHub avatar today? Both my personal and org avatars vanished!
Commit
ceab848
Mine's gone. Resync from GitHub doesn't seem to help. Hopefully this is a bug that'll get resolved soon.
commit ceab848
Looks like it only happened if you had a Gravatar-backed profile pic on Github. I went to Github and it was gone there too, so I uploaded an image directly to Github and now my profile picture is back.