Previously, you would enter an emoji code in some text and when you posted, it would be converted to an image. If you edited the text the emoji code would be gone replaced by the image. If you then saved again you'd often get garbage. 

Not. Good.

Now it works more rationally.

When the item is rendered, the emoji codes are evaluated. But when you edit them, you see the codes and can change them.

:kiss: :collision: :heart: :boom:

Happy!

PS: If you're reading this in an RSS app you may see the codes too. Depends on whether the reader groks emoji codes. Here's the original post on my blog so you can see what I'm talking about. 

PPS: You can test it by posting a reply and entering some emoji codes.