Snapshot 13w16b was released in the launcher. Some big crash fixes, and re-enabled crash reporting too
New Minecraft Launcher:
Dinnerbone and Grum have been hard at work creating a NEW Minecraft launcher, with some pretty sweet features! To get the snapshot, use the new launcher available in the link below. To return to 1.5.1, simply start the old launcher and play as normal. That’s all there is to it!
Credits: The Minecraft and Minecraft Realms teams