I can confirm. I usually get 120 fps but with the snapshot I get closer to 20-25. I checked my resource monitor included in Windows 7 and my graphics cards starts running at top speed and gets very loud. I'm gonna wait till they patch this to play again. I don't want my card to get damaged.
I have the same problem! Running a 14w02c JAR on an MCProhosting server. Sometimes if you exit the gui and right click again it'll fix it. But it doesn't always work. Others on my server have no problem, others have a lot of difficulty setting up beacons
Can confirm