i exploded small amount of TNT(20~50), after some TNT explode, and it crashed.
i was using virtu MVP to run minecraft in i-mode(onboard grapic).
i just wanted to test onboard grapic(Z77) than GTX550ti for power save.
map was superflat overworld.

Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem; Ticking entity

A full error report has been saved to C:\Users\jupiterbjy\AppData\Roaming\.minecraft\crash-reports\crash-2012-12-29_11.32.41-server.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash

— BEGIN ERROR REPORT be0cda6b --------
Full report at:
C:\Users\jupiterbjy\AppData\Roaming\.minecraft\crash-reports\crash-2012-12-29_11.32.41-server.txt
Please show that file to Mojang, NOT just this screen!

Generated 12. 12. 29 오전 11:32

– Head –
Stacktrace:
at ii.a(SourceFile:69)
at ii.a(SourceFile:47)
at ij.a(SourceFile:24)
at yc.a(SourceFile:842)
at in.a(SourceFile:580)
at yc.d(SourceFile:834)
at amq.b(SourceFile:637)
at amq.a(SourceFile:624)
at xx.a(SourceFile:174)
at in.a(SourceFile:630)
at yc.a(SourceFile:1525)
at pz.c(SourceFile:82)
at pz.j_(SourceFile:72)
at yc.a(SourceFile:1319)
at in.a(SourceFile:450)
at yc.g(SourceFile:1297)

– Entity being ticked –
Details:
Entity Type: PrimedTnt (pz)
Entity ID: 629087
Name: Block of TNT
Exact location: -15.51, 62.48, 82.51
Block location: World: (-16,62,82), Chunk: (at 0,3,2 in -1,5; contains blocks -16,0,80 to -1,255,95), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Momentum: 0.00, -0.01, 0.00
Stacktrace:
at yc.h(SourceFile:1196)
at in.h(SourceFile:362)

– Affected level –
Details:
Level name: 1.4.6
All players: 1 total; [iq['jupiterbjy100'/535995, l='1.4.6', x=-14.52, y=69.70, z=86.42]]
Chunk stats: ServerChunkCache: 673 Drop: 0
Level seed: 128779261477009286
Level generator: ID 01 - flat, ver 0. Features enabled: true
Level generator options: 2;7,59x1,3x3,2;1;stronghold,biome_1,village,decoration,dungeon,lake,mineshaft,lava_lake
Level spawn location: World: (82,4,133), Chunk: (at 2,0,5 in 5,8; contains blocks 80,0,128 to 95,255,143), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 6445 game time, 6445 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 51292 (now: false), thunder time: 35847 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.r(SourceFile:744)
at net.minecraft.server.MinecraftServer.q(SourceFile:679)
at bdz.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:613)
at fy.run(SourceFile:849)

– System Details –
Details:
Minecraft Version: 1.4.6
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_10, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 273972656 bytes (261 MB) / 643301376 bytes (613 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 4953 (277368 bytes; 0 MB) allocated, 3514 (196784 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Profiler Position: N/A (disabled)
Vec3 Pool Size: 26485 (1483160 bytes; 1 MB) allocated, 21212 (1187872 bytes; 1 MB) used
Player Count: 1 / 8; [iq['jupiterbjy100'/535995, l='1.4.6', x=-14.52, y=69.70, z=86.42]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

java.lang.IllegalStateException: Entity is already tracked!
at ii.a(SourceFile:69)
at ii.a(SourceFile:47)
at ij.a(SourceFile:24)
at yc.a(SourceFile:842)
at in.a(SourceFile:580)
at yc.d(SourceFile:834)
at amq.b(SourceFile:637)
at amq.a(SourceFile:624)
at xx.a(SourceFile:174)
at in.a(SourceFile:630)
at yc.a(SourceFile:1525)
at pz.c(SourceFile:82)
at pz.j_(SourceFile:72)
at yc.a(SourceFile:1319)
at in.a(SourceFile:450)
at yc.g(SourceFile:1297)
at yc.h(SourceFile:1196)
at in.h(SourceFile:362)
at net.minecraft.server.MinecraftServer.r(SourceFile:744)
at net.minecraft.server.MinecraftServer.q(SourceFile:679)
at bdz.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:613)
at fy.run(SourceFile:849)
— END ERROR REPORT a7889a4d ----------