For example, in this post:
Ones I type now seem to work: 
Apparently the name changed from “slightly_smiling” to “slight_smile” and it broke the old smileys.
(Side note: It bugs me that generic smileys are called “slight”. Slack calls them “simple_smile” which I like a lot better. I know it doesn’t normally matter but if you mouse over them and it says “slight smile” you’re like “what? a ‘slight’ smile? what are you trying to say here??” )
Attn: @techapj
Are you sure? If you type :) in slack it generates the emoji called :slightly_smiling_face:. I know because it always seems passive aggressive in the notification pop-up (because it displays emoji names without rendering). In Slack the two look similar but are not identical:
You’re right! But turns out I’m not crazy. Slack initially used “simple_smile” and then changed it:
In that Twitter thread they suggest you can change it but I’m not seeing such a setting. Anyway, this is about Discourse not Slack. I just mistakenly thought Slack was a good role model for Discourse emoji-wise. :simple_smile:
Looks good!
Except for how smileys are still called “slight_smile” which totally bugs me. 
← genuine smile, not through gritted teeth or anything, as “slight smile” might imply. see what i mean here??
But I know this is a topic for http://meta.discourse.org and that @codinghorror has called a moratorium on emoji quibbles. (: