FTB Crashing Problem - Githubissues

When I play FTB I crash randomly.

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

Minecraft has stopped running because it encountered a problem; Exception in server tick loop This error has been saved to C:\Users\Nelson\Desktop\New folder (3)\FTBBETAA\minecraft\crash-reports\crash-2012-11-11_08.21.24-server.txt for your convenience. Please include a copy of this file if you report this crash to anyone.

--- BEGIN ERROR REPORT a5d2311 -------- Generated 11/11/12 8:21 AM

Minecraft Version: 1.4.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_05, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 222307248 bytes (212 MB) / 596246528 bytes (568 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms256M -Xmx1024M
AABB Pool Size: 4076 (228256 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
FML: MCP v7.19 FML v4.2.18.433 Minecraft Forge 6.0.1.355 Optifine OptiFine_1.4.2_HD_B2 38 mods loaded, 38 mods active mcp Minecraft Coder Pack Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available FML Forge Mod Loader Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available Forge Minecraft Forge Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available mod_CodeChickenCore CodeChicken Core Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available mod_NotEnoughItems Not Enough Items Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available IC2 IndustrialCraft 2 Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available AdvancedMachines [IC2 Advanced Machines Addon](AdvancedMachines 4.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available AdvancedSolarPanel Advanced Solar Panels Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available BuildCraft|Core BuildCraft Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available BuildCraft|Energy BC Energy Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available BuildCraft|Transport BC Transport Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available BuildCraft|Builders BC Builders Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available BuildCraft|Factory BC Factory Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available BuildCraft|Silicon BC Silicon Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available ComputerCraft ComputerCraft Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available CCTurtle ComputerCraft Turtles Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available EnderStorage [EnderStorage](EnderStorage 1.2.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available ExtraBees Extra Bees Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available ExtrabiomesXL ExtrabiomesXL Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available factorization Factorization Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available Forestry Forestry for Minecraft Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available ForgeIRC ForgeIRC Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available GraviSuite Gravitation Suite Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available IC2NuclearControl Nuclear Control Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available mod_InvTweaks Inventory Tweaks Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available IronChest Iron Chest Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available ModularForceFieldSystem Modular ForceField System V2 Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available Mystcraft Mystcraft Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available ObsidiPlates Obsidian Pressure Plates Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available PortalGun PortalGun Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available Railcraft Railcraft Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available mod_ReiMinimap mod_ReiMinimap Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available StevesCarts Steve's Carts Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available ThermalExpansion|Core Thermal Expansion Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available ThermalExpansion|Factory Factory Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available ThermalExpansion|Energy Energy Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available TwilightForest The Twilight Forest Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available GregTech_Addon GregTech-Addon Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
Is Modded: Definitely; 'forge,fml'
Profiler Position: N/A (disabled)
Vec3 Pool Size: 557 (31192 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [ih['Mr_PuddingMan'/153, l='Lies!', x=135.35, y=66.00, z=-49.64]]
World Lies! Entities: 2 total; [EntityTFRaven['Forest Raven'/3, l='Lies!', x=-4.00, y=55.00, z=992.00], EntityTFRaven['Forest Raven'/4, l='Lies!', x=0.00, y=55.00, z=993.00]]
World Lies! Players: 0 total; []
World Lies! Chunk Stats: ServerChunkCache: 170 Drop: 0
Type: Integrated Server

java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(Unknown Source) at java.util.ArrayList$Itr.next(Unknown Source) at ib.b(PlayerManager.java:71) at ie.b(WorldServer.java:136) at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:653) at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:590) at bcb.q(IntegratedServer.java:110) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497) at fp.run(SourceFile:818) --- END ERROR REPORT 233179c7 ----------

Slowpoke101 / FTBLaunch

FTB Crashing Problem #292