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

Time: 16.07.13 2:12
Description: Reading NBT data

java.lang.ClassCastException: ce cannot be cast to cg
	at bx.f(SourceFile:138)
	at ady.a(SourceFile:30)
	at alk.a(SourceFile:215)
	at alk.a(SourceFile:186)
	at alk.a(SourceFile:145)
	at net.minecraft.server.MinecraftServer.a(SourceFile:113)
	at bkw.a(SourceFile:61)
	at bkw.d(SourceFile:106)
	at net.minecraft.server.MinecraftServer.run(SourceFile:314)
	at hh.run(SourceFile:582)


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: LastUpdate
	Tag parent: Level
Stacktrace:
	at bx.f(SourceFile:138)
	at ady.a(SourceFile:30)
	at alk.a(SourceFile:215)
	at alk.a(SourceFile:186)
	at alk.a(SourceFile:145)
	at net.minecraft.server.MinecraftServer.a(SourceFile:113)
	at bkw.a(SourceFile:61)
	at bkw.d(SourceFile:106)
	at net.minecraft.server.MinecraftServer.run(SourceFile:314)
	at hh.run(SourceFile:582)

-- System Details --
Details:
	Minecraft Version: 1.6.2
	Operating System: Windows XP (x86) version 5.1
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 23540304 bytes (22 MB) / 70590464 bytes (67 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 1 total; -Xmx512M
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.