Twitch streaming broken (OS X 10.9)

New snapshot won't stream direct to Twitch, even with the latest OS (10.9)

What I expected to happen was...:
Streaming to Twitch (duh)

What actually happened was...:
Recieved the message shown in the picture
Twitch Broadcasting Unavailable
Unfortunately, your computer does not support the integerated Twitch broadcasting service.

(Reason: null)

Steps to Reproduce:
1. Install Mavericks
2. Try to stream with 13w47c selected