I got this crash report from optifine C1 for 1.4.3: (everything below is the crash report)
---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.
Time: 11/7/12 6:54 AM
Description: Exception while ticking a block
java.lang.IllegalStateException: Entity is already tracked!
at ih.a(SourceFile:72)
at ih.a(SourceFile:59)
at ii.a(SourceFile:24)
at xv.a(SourceFile:842)
at im.a(SourceFile:580)
at xv.d(SourceFile:834)
at akg.l(SourceFile:55)
at akg.b(SourceFile:35)
at im.a(SourceFile:389)
at im.b(SourceFile:136)
at net.minecraft.server.MinecraftServer.r(SourceFile:742)
at net.minecraft.server.MinecraftServer.q(SourceFile:685)
at bdh.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:619)
at fx.run(SourceFile:855)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Stacktrace:
at ih.a(SourceFile:72)
at ih.a(SourceFile:59)
at ii.a(SourceFile:24)
at xv.a(SourceFile:842)
at im.a(SourceFile:580)
at xv.d(SourceFile:834)
at akg.l(SourceFile:55)
at akg.b(SourceFile:35)
-- Block being ticked --
Details:
Block type: ID #13 (tile.gravel // akd)
Block data value: 0 / 0x0 / 0b0000
Block location: World: (-250,41,395), Chunk: (at 6,2,11 in -16,24; contains blocks -256,0,384 to -241,255,399), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Stacktrace:
at im.a(SourceFile:389)
at im.b(SourceFile:136)
-- Affected level --
Details:
Level name: Survival
All players: 1 total; [ip['3ddy10000'/150375, l='Survival', x=-208.50, y=-2.79, z=232.50]]
Chunk stats: ServerChunkCache: 1089 Drop: 0
Level seed: -1500504759
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (-204,64,236), Chunk: (at 4,4,12 in -13,14; contains blocks -208,0,224 to -193,255,239), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 106 game time, 106 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 39947 (now: false), thunder time: 111651 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.r(SourceFile:742)
at net.minecraft.server.MinecraftServer.q(SourceFile:685)
at bdh.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:619)
at fx.run(SourceFile:855)
-- System Details --
Details:
Minecraft Version: 1.4.3
Operating System: Mac OS X (x86_64) version 10.8.2
Java Version: 1.6.0_37, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 8020863688 bytes (7649 MB) / 8607432704 bytes (8208 MB) up to 17175543808 bytes (16379 MB)
JVM Flags: 2 total; -Xms8192m -Xmx16384m
AABB Pool Size: 47652 (2668512 bytes; 2 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: IWrUpdater, Config, WrUpdates, ...]
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
Profiler Position: N/A (disabled)
Vec3 Pool Size: 3195 (178920 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [ip['3ddy10000'/150375, l='Survival', x=-208.50, y=-2.79, z=232.50]]
Type: Integrated Server (map_client.txt)
Is Modded: Very likely; Jar signature invalidated
0
IGN: 3ddy
1
0
0
0
Name of friends: tekkit03 and sigbott
0
0
0
---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.
Time: 11/7/12 6:54 AM
Description: Exception while ticking a block
java.lang.IllegalStateException: Entity is already tracked!
at ih.a(SourceFile:72)
at ih.a(SourceFile:59)
at ii.a(SourceFile:24)
at xv.a(SourceFile:842)
at im.a(SourceFile:580)
at xv.d(SourceFile:834)
at akg.l(SourceFile:55)
at akg.b(SourceFile:35)
at im.a(SourceFile:389)
at im.b(SourceFile:136)
at net.minecraft.server.MinecraftServer.r(SourceFile:742)
at net.minecraft.server.MinecraftServer.q(SourceFile:685)
at bdh.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:619)
at fx.run(SourceFile:855)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Stacktrace:
at ih.a(SourceFile:72)
at ih.a(SourceFile:59)
at ii.a(SourceFile:24)
at xv.a(SourceFile:842)
at im.a(SourceFile:580)
at xv.d(SourceFile:834)
at akg.l(SourceFile:55)
at akg.b(SourceFile:35)
-- Block being ticked --
Details:
Block type: ID #13 (tile.gravel // akd)
Block data value: 0 / 0x0 / 0b0000
Block location: World: (-250,41,395), Chunk: (at 6,2,11 in -16,24; contains blocks -256,0,384 to -241,255,399), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Stacktrace:
at im.a(SourceFile:389)
at im.b(SourceFile:136)
-- Affected level --
Details:
Level name: Survival
All players: 1 total; [ip['3ddy10000'/150375, l='Survival', x=-208.50, y=-2.79, z=232.50]]
Chunk stats: ServerChunkCache: 1089 Drop: 0
Level seed: -1500504759
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (-204,64,236), Chunk: (at 4,4,12 in -13,14; contains blocks -208,0,224 to -193,255,239), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 106 game time, 106 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 39947 (now: false), thunder time: 111651 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.r(SourceFile:742)
at net.minecraft.server.MinecraftServer.q(SourceFile:685)
at bdh.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:619)
at fx.run(SourceFile:855)
-- System Details --
Details:
Minecraft Version: 1.4.3
Operating System: Mac OS X (x86_64) version 10.8.2
Java Version: 1.6.0_37, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 8020863688 bytes (7649 MB) / 8607432704 bytes (8208 MB) up to 17175543808 bytes (16379 MB)
JVM Flags: 2 total; -Xms8192m -Xmx16384m
AABB Pool Size: 47652 (2668512 bytes; 2 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: IWrUpdater, Config, WrUpdates, ...]
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
Profiler Position: N/A (disabled)
Vec3 Pool Size: 3195 (178920 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [ip['3ddy10000'/150375, l='Survival', x=-208.50, y=-2.79, z=232.50]]
Type: Integrated Server (map_client.txt)
Is Modded: Very likely; Jar signature invalidated