[Affecting Live Content] Stranded in Space crashes when ship explodes

Verification builds: Release 1064482 - 1.6.0.8 BETA
Summary: When ship explodes Minecraft will intermittently crash. The issue is intermittent and I was only able to reproduce it 50% of the time.

Repro Steps:

1. Download and open Stranded in Space
2. Press the first button to begin the game.
3. optional press the skip intro button.
4. When teleported to the ship, stand there and not move while the ship explosion sequence plays out (can take a couple of minutes).

Observed Results: When you get onto the ship, you are set with a new spawn point, so if you die, you will appear on the planet. Either kill yourself or wait for the ships to fail. When the ships shields fail, a number of rabbits are summoned to your location in an attempt to kill you, if they are not successful after 5 explosions, a /kill is done to make sure to finish the job. When you press respawn you will teleport to your new location the game will hang momentarily and then crash. Some notes about the new location: There are some testfor commands to look for you in this position, if it finds you it does a few things like clearing command blocks and setting up the environment.

This only happens half the time, the other half it works just fine.

Expected Results: You respawn at your new spawn point and continue the game as normal.

Impact: This renders one of the potential ways off the ship (a common one) to result in crashing for people who purchased it.

Regression Build: 1.6 RC0