Yeah. I'd have to concur with Nick, this update has loving ruined single player. It's like I'm connecting through localhost with Minecraft's horrible networking, it's taking twice the resources it should be taking, and I'm forced to load chunks from this gay ass listen server instead of my hard drive. Development has gone down the drain since 1.7, and this just takes the cake. If you're going to make the client be able to host, either take the chunks from the hard drive instead of taking them from a loving localhost server (which would be at least 12x faster because of minecraft's loving horrible network backbone,) or fix networking.