I placed a minecart onto tracks and the client crashed. Attempts to go back into the server crash the client.
Environment
Operating System: Mac OS X (x86_64) version 10.8.5
Java Version: 1.6.0_51, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Looks like this is fixed in 13w38c but now having a new issue MC-31922