"Not working" Hmm... something like this doesn't just not work.

Corrupted chunks pretty obvious

-- Head --
Stacktrace:
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:164)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
at java.io.DataInputStream.readFully(DataInputStream.java:195)
at java.io.DataInputStream.readFully(DataInputStream.java:169)
at net.minecraft.server.v1_7_R3.NBTTagByteArray.load(NBTTagByteArray.java:29)

-- NBT Tag --
Details:
Tag name: Blocks
Tag type: 7
Stacktrace:
at net.minecraft.server.v1_7_R3.NBTTagCompound.a(NBTTagCompound.java:324)
at net.minecraft.server.v1_7_R3.NBTTagCompound.load(NBTTagCompound.java:49)
at net.minecraft.server.v1_7_R3.NBTTagList.load(SourceFile:37)
at net.minecraft.server.v1_7_R3.NBTTagCompound.a(NBTTagCompound.java:324)
at net.minecraft.server.v1_7_R3.NBTTagCompound.load(NBTTagCompound.java:49)
at net.minecraft.server.v1_7_R3.NBTTagCompound.a(NBTTagCompound.java:324)
at net.minecraft.server.v1_7_R3.NBTTagCompound.load(NBTTagCompound.java:49)
at net.minecraft.server.v1_7_R3.NBTCompressedStreamTools.a(SourceFile:120)
at net.minecraft.server.v1_7_R3.NBTCompressedStreamTools.a(SourceFile:89)