Client Crash when on the Moon

[ProsperCraft]

Minecraft Version = 1.6.2

Forge Version = 6.2.43.818

Galacticraft Version = a0.1.39.566

Detailed Description = was jumping on the moon and placing floodlights and crashed
crash-report
http://paste.md-5.net/caqavuluqi.coffee

Full Forge Log = http://paste.md-5.net/jaferiqafe.vhdl