Minecraft 13w47c, Minecraft 13w47d, Minecraft 13w47e
OS: Mac OS X 10.9
Processor: 2.8 GHz Intel Core 2 Duo
Graphics: NVIDIA Geforce 9600 GT 512 MB (openGL 2.1 according to the snooper)
Java 1.6.0_65 (Apple)
I searched carefully but couldn't find this particular bug yet. So here it goes:
When streaming the stream on twitch.tv displays a mostly green screen and only the top will show a jaggy display of what should be seen. Minecraft self displays the image correctly. When moving around in the game the part that is visible on the stream stutters and is jaggy. Please see the screenshot attached.