I'm confused here (not too surprising I guess). I see me holding a fish, both in my post and as my avatar. Is that not what others are seeing?
Now that you mention it, yes that's what I see.
Before you mentioned it, I saw the old avatar. It was in my browser cache.
Here is what I did:
1: Click on your avatar (to get enlarged view)
2: Force a reload. With mozilla, that SHIFT RELOAD.
After that I saw the new image. Then a reload of your post shows the new avatar.
People who do nothing will continue to see your old avatar until their cache copy of the old image reaches its expiry date.