This is rather odd. Consider this answer.

The current content of the answer according to http://api.meta.stackoverflow.com/1.1/answers/81451?body=true is:

...<img src="https://i.sstatic.net/SKfk2.png"...

However, the content returned from http://api.meta.stackoverflow.com/1.1/revisions/81451 tend to indicate that the latest revision changed the contents to:

...<img src="http://imgur.com/NIqOe.png"...

Which source is correct?