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Okay, i have a BIG problem. I had 1.3.2 for like about 5 months (including the last 4 days) cause i couldn't figure out how to update it. I made a new creative mode world in 132 in super flat where i could bake statues peacefully. I went to the end and fought the dragon, leveling up to level 53. I went back to the normal world and spawned a wolf, then another wolf, till i had like 35. i put it on easy and my wolfs got me up to level 72. after i saw an enderman i put it on peaceful and tried going to the end with a wolf egg and the game crashed. it said this in the crash reports files


---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 11/22/12 11:06 AM
Description: Ticking entity

java.lang.IllegalStateException: Entity is already tracked!
at ii.a(SourceFile:72)
at ii.a(SourceFile:61)
at ij.a(SourceFile:24)
at xv.a(SourceFile:842)
at in.a(SourceFile:581)
at xv.d(SourceFile:834)
at gm.a(SourceFile:369)
at lq.b(SourceFile:1492)
at amg.a(SourceFile:62)
at lq.D(SourceFile:652)
at lq.d(SourceFile:615)
at lz.j_(SourceFile:111)
at xv.a(SourceFile:1317)
at in.a(SourceFile:451)
at xv.g(SourceFile:1296)
at xv.h(SourceFile:1195)
at in.h(SourceFile:363)
at net.minecraft.server.MinecraftServer.r(SourceFile:751)
at net.minecraft.server.MinecraftServer.q(SourceFile:686)
at bdo.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:620)
at fy.run(SourceFile:856)


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

-- Head --
Stacktrace:
at ii.a(SourceFile:72)
at ii.a(SourceFile:61)
at ij.a(SourceFile:24)
at xv.a(SourceFile:842)
at in.a(SourceFile:581)
at xv.d(SourceFile:834)
at gm.a(SourceFile:369)
at lq.b(SourceFile:1492)
at amg.a(SourceFile:62)
at lq.D(SourceFile:652)
at lq.d(SourceFile:615)
at lz.j_(SourceFile:111)
at xv.a(SourceFile:1317)
at in.a(SourceFile:451)
at xv.g(SourceFile:1296)

-- Entity being ticked --
Details:
Entity Type: XPOrb (lz)
Entity ID: 477
Name: Experience Orb
Exact location: 100.00, 50.13, 0.00
Block location: World: (100,50,0), Chunk: (at 4,3,0 in 6,0; contains blocks 96,0,0 to 111,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Momentum: -0.01, 0.14, 0.01
Stacktrace:
at xv.h(SourceFile:1195)
at in.h(SourceFile:363)

-- Affected level --
Details:
Level name: Creation World - Modern Craft
All players: 1 total; [iq['Player'/444, l='Creation World - Modern Craft', x=100.00, y=49.00, z=0.00]]
Chunk stats: ServerChunkCache: 441 Drop: 0
Level seed: -6315776219201311976
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (0,0,0), Chunk: (at 0,0,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 0 game time, 0 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: ~~ERROR~~ NullPointerException: null
Stacktrace:
at net.minecraft.server.MinecraftServer.r(SourceFile:751)
at net.minecraft.server.MinecraftServer.q(SourceFile:686)
at bdo.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:620)
at fy.run(SourceFile:856)

-- System Details --
Details:
Minecraft Version: 1.4.5
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_09, Oracle Corporation
Java VM Version: Java HotSpot™ Client VM (mixed mode), Oracle Corporation
Memory: 445766392 bytes (425 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 7239 (405384 bytes; 0 MB) allocated, 7239 (405384 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: 820 (45920 bytes; 0 MB) allocated, 816 (45696 bytes; 0 MB) used
Player Count: 1 / 8; [iq['Player'/444, l='Creation World - Modern Craft', x=100.00, y=49.00, z=0.00]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

and now i cant play on my PRECIOUS little world help

So it crashed you can just restart minecraft.

But when i restart the same message appear when i load the world.

Hmmm are you in full screen or in another language?

Legit english and big window (The one between fullscreen and small window)