pusher/pusher-js — pull request #40 by marcelaraujo (2013-05-06 19:05:32+00:00)
Title: Error on pusher_internal:authorized callback event.

If channel data is not sent by emitter on private and presence channels, it will break JSON.parser on null data received.

Uncaught SyntaxError: Unexpected token u
(anonymous function)
prototype.emit
(anonymous function)
xhr.onreadystatechange