MC Logblock TP Chest Crash

gistfile1.txt

17:04:32 [INFO] Pepperus issued server command: /lb tp chestaccess 12erik
17:04:45 [WARNING] Could not properly handle event CHUNK_LOAD:
java.lang.IllegalAccessError: Synchronized code got accessed from another thread: java.util.concurrent.ThreadPoolExecutor$Worker
        at org.bukkit.event.Listener.onChunkLoad(Listener:0)
        at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:339)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
        at net.minecraft.server.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:112)
        at net.timedminecraft.server.TimedChunkProviderServer.getChunkAt(TimedChunkProviderServer.java:183)
        at org.bukkit.craftbukkit.CraftWorld.getChunkAt(CraftWorld.java:106)
        at org.bukkit.craftbukkit.CraftWorld.getChunkAt(CraftWorld.java:475)
        at de.diddiz.util.BukkitUtils.saveSpawnHeight(BukkitUtils.java:225)
        at de.diddiz.LogBlock.CommandsHandler$CommandTeleport.run(CommandsHandler.java:553)
        at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:52)
        at org.bukkit.craftbukkit.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
17:04:45 [INFO] This error is logged only once: it could have occurred multiple times by now.
17:04:45 [INFO] Please contact one of the authors of plugin 'LogBlock': DiddiZ
17:04:45 [WARNING] Could not properly handle event PLAYER_TELEPORT:
java.lang.IllegalAccessError: Synchronized code got accessed from another thread: java.util.concurrent.ThreadPoolExecutor$Worker
        at org.bukkit.event.Listener.onPlayerTeleport(Listener:0)
        at sun.reflect.GeneratedMethodAccessor90.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:339)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
        at org.bukkit.craftbukkit.entity.CraftPlayer.teleport(CraftPlayer.java:355)
        at org.bukkit.craftbukkit.entity.CraftEntity.teleport(CraftEntity.java:162)
        at de.diddiz.LogBlock.CommandsHandler$CommandTeleport.run(CommandsHandler.java:555)
        at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:52)
        at org.bukkit.craftbukkit.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
17:04:45 [INFO] This error is logged only once: it could have occurred multiple times by now.
17:04:45 [INFO] Please contact one of the authors of plugin 'LogBlock': DiddiZ
17:04:45 [SEVERE] java.lang.NullPointerException
17:04:45 [SEVERE]       at net.minecraft.server.World.tickEntities(World.java:1152)
17:04:45 [SEVERE]       at net.minecraft.server.WorldServer.tickEntities(WorldServer.java:428)
17:04:45 [SEVERE]       at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:564)
17:04:45 [SEVERE]       at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:213)
17:04:45 [SEVERE]       at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474)
17:04:45 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406)
17:04:45 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
17:04:45 [SEVERE] Encountered an unexpected exception NullPointerException
java.lang.NullPointerException
        at net.minecraft.server.World.tickEntities(World.java:1152)
        at net.minecraft.server.WorldServer.tickEntities(WorldServer.java:428)
        at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:564)
        at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:213)
        at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
17:04:46 [SEVERE] This crash report has been saved to: /home/games/minecraft/servers/main/./crash-reports/crash-2012-08-31_17.04.46-server.txt
>stop