WTF...

2011-12-19 07:33:22 [SEVERE] java.util.zip.ZipException: incorrect data check

2011-12-19 07:33:22 [SEVERE]    at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:164)

2011-12-19 07:33:22 [SEVERE]    at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)

2011-12-19 07:33:22 [SEVERE]    at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)

2011-12-19 07:33:22 [SEVERE]    at java.io.BufferedInputStream.read(BufferedInputStream.java:334)

2011-12-19 07:33:22 [SEVERE]    at java.io.DataInputStream.readFully(DataInputStream.java:195)

2011-12-19 07:33:22 [SEVERE]    at java.io.DataInputStream.readFully(DataInputStream.java:169)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.NBTTagByteArray.load(SourceFile:25)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.NBTBase.b(SourceFile:95)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.NBTTagCompound.load(SourceFile:27)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.NBTBase.b(SourceFile:95)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.NBTTagCompound.load(SourceFile:27)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.NBTBase.b(SourceFile:95)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.NBTCompressedStreamTools.a(SourceFile:75)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.ChunkRegionLoader.a(SourceFile:52)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.ChunkProviderServer.loadChunk(ChunkProviderServer.java:124)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:67)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:319)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:165)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:399)

2011-12-19 07:33:22 [SEVERE]    at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)