java.lang.ClassCastException: cf cannot be cast to ch
	at by.f(SourceFile:138)
	at tp.a(SourceFile:93)
	at ye.D(SourceFile:580)
	at of.l_(SourceFile:1170)
	at uf.l_(SourceFile:203)
	at jv.h(SourceFile:185)
	at ka.a(SourceFile:190)
	at eu.a(SourceFile:136)
	at cn.b(SourceFile:64)
	at ka.e(SourceFile:60)
	at kd.b(SourceFile:37)
	at blc.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.t(SourceFile:489)
	at net.minecraft.server.MinecraftServer.s(SourceFile:406)
	at bkz.s(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:340)
	at hi.run(SourceFile:583)

---- Minecraft Crash Report ----
// Why did you do that?

Time: 19-09-13 12:43 PM
Description: Reading NBT data

java.lang.ClassCastException: cf cannot be cast to ch
	at by.f(SourceFile:138)
	at tp.a(SourceFile:93)
	at ye.D(SourceFile:580)
	at of.l_(SourceFile:1170)
	at uf.l_(SourceFile:203)
	at jv.h(SourceFile:185)
	at ka.a(SourceFile:190)
	at eu.a(SourceFile:136)
	at cn.b(SourceFile:64)
	at ka.e(SourceFile:60)
	at kd.b(SourceFile:37)
	at blc.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.t(SourceFile:489)
	at net.minecraft.server.MinecraftServer.s(SourceFile:406)
	at bkz.s(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:340)
	at hi.run(SourceFile:583)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Corrupt NBT tag --
Details:
	Tag type found: INT
	Tag type expected: LONG
	Tag name: UUIDMost
Stacktrace:
	at by.f(SourceFile:138)
	at tp.a(SourceFile:93)
	at ye.D(SourceFile:580)
	at of.l_(SourceFile:1170)
	at uf.l_(SourceFile:203)

-- Player being ticked --
Details:
	Entity Type: null (jv)
	Entity ID: 162947
	Entity Name: janitoalevic
	Entity's Exact location: 444,50, 89,10, -157,50
	Entity's Block location: World: (444,89,-158), Chunk: (at 12,5,2 in 27,-10; contains blocks 432,0,-160 to 447,255,-145), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Entity's Momentum: 0,00, -0,08, 0,00
Stacktrace:
	at jv.h(SourceFile:185)
	at ka.a(SourceFile:190)
	at eu.a(SourceFile:136)
	at cn.b(SourceFile:64)
	at ka.e(SourceFile:60)

-- Ticking connection --
Details:
	Connection: ka@4ee5ebba
Stacktrace:
	at kd.b(SourceFile:37)
	at blc.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.t(SourceFile:489)
	at net.minecraft.server.MinecraftServer.s(SourceFile:406)
	at bkz.s(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:340)
	at hi.run(SourceFile:583)

-- System Details --
Details:
	Minecraft Version: 1.6.4
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_17, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 202136336 bytes (192 MB) / 378863616 bytes (361 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 6011 (336616 bytes; 0 MB) allocated, 2308 (129248 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1055 (59080 bytes; 0 MB) allocated, 928 (51968 bytes; 0 MB) used
	Player Count: 1 / 8; [jv['janitoalevic'/162947, l='Perdido en la supervivencia', x=444,50, y=89,10, z=-157,50]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.