Serverlog on error

2012-01-12 09:08:08 [INFO] Starting minecraft server version 1.0.1
2012-01-12 09:08:08 [INFO] Loading properties
2012-01-12 09:08:08 [INFO] Starting Minecraft server on *:25565
2012-01-12 09:08:08 [INFO] This server is running Craftbukkit version git-Bukkit-1.0.1-R1-b1597jnks (MC: 1.0.1) (Implementing API version 1.0.1-R1)
2012-01-12 09:08:08 [INFO] Preparing level "world_survival"
2012-01-12 09:08:08 [INFO] Default game type: 0
2012-01-12 09:08:08 [INFO] Preparing start region for level 0 (Seed: 3047688760338658087)
2012-01-12 09:08:08 [INFO] Preparing start region for level 1 (Seed: 3119881213843106164)
2012-01-12 09:08:09 [INFO] [MyWorlds] Using build-in 'Bukkit SuperPerms' as permissions plugin!
2012-01-12 09:08:09 [INFO] [MyWorlds] Loading or creating world: 'world' using seed 0
2012-01-12 09:08:09 [INFO] Preparing start region for level 2 (Seed: 8806512120772740392)
2012-01-12 09:08:09 [INFO] [MyWorlds] Loading or creating world: 'flat' using seed 0
2012-01-12 09:08:09 [INFO] Preparing start region for level 3 (Seed: 1315227639725369344)
2012-01-12 09:08:09 [INFO] [MyWorlds] Successfully bound variable to region file cache.
2012-01-12 09:08:09 [INFO] [MyWorlds] File references to unloaded worlds will be cleared!
2012-01-12 09:08:09 [INFO] [MyWorlds] version 1.33 is enabled!
2012-01-12 09:08:09 [INFO] [TrainCarts] MyWorlds detected, support for portal sign train teleportation added!
2012-01-12 09:08:09 [INFO] [TrainCarts] 1 Train has been loaded in 1 world. (2 Minecarts)
2012-01-12 09:08:09 [SEVERE] Could not pass event CHUNK_LOAD to Train Carts
java.util.ConcurrentModificationException
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:782)
	at java.util.ArrayList$Itr.remove(ArrayList.java:768)
	at com.bergerkiller.bukkit.tc.GroupManager.refresh(GroupManager.java:331)
	at com.bergerkiller.bukkit.tc.Listeners.TCWorldListener.onChunkLoad(TCWorldListener.java:38)
	at org.bukkit.plugin.java.JavaPluginLoader$52.execute(JavaPluginLoader.java:626)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:339)
	at net.minecraft.server.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:92)
	at org.bukkit.craftbukkit.CraftWorld.getChunkAt(CraftWorld.java:101)
	at com.bergerkiller.bukkit.tc.GroupManager.refresh(GroupManager.java:319)
	at com.bergerkiller.bukkit.tc.GroupManager.refresh(GroupManager.java:291)
	at com.bergerkiller.bukkit.tc.TrainCarts.onEnable(TrainCarts.java:149)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:188)
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:968)
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:280)
	at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:186)
	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:169)
	at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:348)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:335)
	at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:165)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:399)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
2012-01-12 09:08:09 [SEVERE] Error occurred while enabling Train Carts v1.54 (Is it up to date?): null
java.util.ConcurrentModificationException
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:782)
	at java.util.ArrayList$Itr.remove(ArrayList.java:768)
	at com.bergerkiller.bukkit.tc.GroupManager.refresh(GroupManager.java:331)
	at com.bergerkiller.bukkit.tc.GroupManager.refresh(GroupManager.java:291)
	at com.bergerkiller.bukkit.tc.TrainCarts.onEnable(TrainCarts.java:149)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:188)
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:968)
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:280)
	at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:186)
	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:169)
	at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:348)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:335)
	at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:165)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:399)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
2012-01-12 09:08:09 [INFO] Server permissions file permissions.yml is empty, ignoring it
2012-01-12 09:08:09 [INFO] Done (0.137s)! For help, type "help" or "?"
2012-01-12 09:08:09 [INFO] Starting GS4 status listener
2012-01-12 09:08:09 [INFO] Query running on 0.0.0.0:25565
2012-01-12 09:08:13 [INFO] Plugins: My Worlds, Train Carts