Any time I edit a Position Keyframe Minecraft completely crashes when I hit the save button. The new launcher doesn't seem to be saving the output, but here's what I got from OpenEye:
http://openeye.openmods.info/crashes/551786580f69ddbd91919bf56582be10
This is actually an issue I've had for a while now, sorry for not reporting it until now! I tried updating Forge and Optifine, neither fixed the scenario.
