Quick fix for Chatty due to broken emoticons Twitch API endpoint:

Download this file:
https://www.dropbox.com/s/uuo9lil1beg88vl/emoticons?dl=0

Put it into the Chatty settings directory (to find out what the Chatty settings directory is, go into Chatty and enter the "/dir" command or "/openDir" to directly open it), then close Chatty and restart it.

The file is dated to 2015-04-01, so until then Chatty won't update emoticons automatically and only load it from file. If you use "/refresh emoticons" and the refresh succeeds, the file will be replaced.