crash

---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 05/12/12 22:19
Description: loading nbt data

java.io.EOFException
	at java.io.DataInputStream.readByte(Unknown Source)
	at bu.b(SourceFile:87)
	at bh.a(SourceFile:33)
	at bu.b(SourceFile:95)
	at bh.a(SourceFile:33)
	at bp.a(SourceFile:38)
	at bu.b(SourceFile:95)
	at bh.a(SourceFile:33)
	at bp.a(SourceFile:38)
	at bu.b(SourceFile:95)
	at bh.a(SourceFile:33)
	at bu.b(SourceFile:95)
	at br.a(CompressedStreamTools.java:126)
	at br.a(CompressedStreamTools.java:170)
	at net.minecraftforge.common.ForgeChunkManager.loadWorld(ForgeChunkManager.java:338)
	at net.minecraftforge.common.ForgeInternalHandler.onDimensionLoad(ForgeInternalHandler.java:46)
	at net.minecraftforge.event.ASMEventHandler_1_ForgeInternalHandler_onDimensionLoad_Load.invoke(.dynamic)
	at net.minecraftforge.event.ASMEventHandler.invoke(ASMEventHandler.java:35)
	at net.minecraftforge.event.EventBus.post(EventBus.java:103)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:278)
	at hg.c(DedicatedServer.java:153)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:454)
	at fp.run(SourceFile:818)

Relevant Details:
- Minecraft Version: 1.4.2
- Operating System: Windows 7 (amd64) version 6.1
- Java Version: 1.7.0_