Twitch Broadcasting Unavailable

What I expected to happen was...: Trying to Stream to Twitch
Describe what you thought should happen here
Start streaming

What actually happened was...:
Describe what happened here
Minecraft just said: Twitch Broadcasting Unavailable
Unable to load the libraries needed for the integrated Twitch broadcasting service.

Steps to Reproduce:
1. Start Minecraft 1.7.4
2. Load a map
3. Press F6