Hopper: java.lang.ClassCastException: dt cannot be cast to dm

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-465498/

Crash:

java.lang.ClassCastException: dt cannot be cast to dm
	at dg.l(SourceFile:202)

The following is the first clean report made public about this crash:

---- Minecraft Crash Report ----
// You're mean.

Time: 20.10.13 01:39
Description: Reading NBT data

java.lang.ClassCastException: dt cannot be cast to dm
	at dg.l(SourceFile:202)
	at bjx.h(SourceFile:87)
	at bkg.a(SourceFile:64)
	at azd.o(SourceFile:1563)
	at azd.ad(SourceFile:753)
	at azd.e(SourceFile:704)
	at net.minecraft.client.main.Main.main(SourceFile:103)


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

-- Head --
Stacktrace:
	at dg.l(SourceFile:202)

-- Corrupt NBT tag --
Details:
	Tag type found: STRING
	Tag type expected: INT[]
	Tag name: FadeColors
Stacktrace:
	at dg.l(SourceFile:202)
	at bjx.h(SourceFile:87)

-- Particle being ticked --
Details:
	Particle: bjx, Pos (2338.5,54.75,-589.5), RGBA (1.0,1.0,1.0,1.0), Age 0
	Particle Type: MISC_TEXTURE
Stacktrace:
	at bkg.a(SourceFile:64)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bje['WitherBossEntity'/1, l='MpServer', x=2341,56, y=54,62, z=-587,26]]
	Chunk stats: MultiplayerChunkCache: 225, 225
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (2317,57,-566), Chunk: (at 13,3,10 in 144,-36; contains blocks 2304,0,-576 to 2319,255,-561), Region: (4,-2; contains chunks 128,-64 to 159,-33, blocks 2048,0,-1024 to 2559,255,-513)
	Level time: 492253 game time, 6000 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 3 total; [xo['arrow'/0, l='MpServer', x=2279,22, y=55,97, z=-554,28], bje['WitherBossEntity'/1, l='MpServer', x=2341,56, y=54,62, z=-587,26], xr['entity.FireworksRocketEntity.name'/3623, l='MpServer', x=2338,50, y=54,75, z=-589,50]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at biz.a(SourceFile:284)
	at azd.b(SourceFile:1951)
	at azd.e(SourceFile:713)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 73525384 bytes (70 MB) / 167944192 bytes (160 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 468 (26208 bytes; 0 MB) allocated, 121 (6776 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.7.2
	LWJGL: 2.9.0
	OpenGL: GeForce 8600 GT/PCIe/SSE2 GL version 3.3.0, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 84 (4704 bytes; 0 MB) allocated, 29 (1624 bytes; 0 MB) used
	Anisotropic Filtering: Off (1)

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-465498/21347507/