2013-02-16 14:23:52 [SEVERE] Exception in thread "pool-1-thread-139"
2013-02-16 14:23:52 [SEVERE] org.apache.commons.lang.UnhandledException: Plugin AuthMe v2.7.8 generated an exception while executing task 37478
	at org.bukkit.craftbukkit.v1_4_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
	at java.util.TreeMap.rotateRight(Unknown Source)
	at java.util.TreeMap.fixAfterInsertion(Unknown Source)
	at java.util.TreeMap.put(Unknown Source)
	at java.util.TreeSet.add(Unknown Source)
	at net.minecraft.server.v1_4_R1.WorldServer.a(WorldServer.java:418)
	at net.minecraft.server.v1_4_R1.WorldServer.a(WorldServer.java:387)
	at net.minecraft.server.v1_4_R1.BlockSand.onPlace(BlockSand.java:19)
	at net.minecraft.server.v1_4_R1.Chunk.a(Chunk.java:433)
	at net.minecraft.server.v1_4_R1.Chunk.a(Chunk.java:365)
	at net.minecraft.server.v1_4_R1.World.setRawTypeId(World.java:328)
	at net.minecraft.server.v1_4_R1.WorldGenSand.a(SourceFile:31)
	at net.minecraft.server.v1_4_R1.BiomeDecorator.a(SourceFile:73)
	at net.minecraft.server.v1_4_R1.BiomeDecorator.a(SourceFile:27)
	at net.minecraft.server.v1_4_R1.BiomeBase.a(SourceFile:217)
	at net.minecraft.server.v1_4_R1.ChunkProviderGenerate.getChunkAt(SourceFile:450)
	at org.bukkit.craftbukkit.v1_4_R1.generator.NormalChunkGenerator.getChunkAt(NormalChunkGenerator.java:49)
	at net.minecraft.server.v1_4_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:226)
	at net.minecraft.server.v1_4_R1.Chunk.a(Chunk.java:797)
	at net.minecraft.server.v1_4_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:143)
	at net.minecraft.server.v1_4_R1.PlayerChunk.<init>(PlayerChunk.java:24)
	at net.minecraft.server.v1_4_R1.PlayerChunkMap.a(PlayerChunkMap.java:70)
	at net.minecraft.server.v1_4_R1.PlayerChunkMap.addPlayer(PlayerChunkMap.java:113)
	at net.minecraft.server.v1_4_R1.PlayerList.moveToWorld(PlayerList.java:399)
	at org.bukkit.craftbukkit.v1_4_R1.entity.CraftPlayer.teleport(CraftPlayer.java:392)
	at org.bukkit.craftbukkit.v1_4_R1.entity.CraftEntity.teleport(CraftEntity.java:189)
	at uk.org.whoami.authme.Utils$1.run(Utils.java:172)
	at org.bukkit.craftbukkit.v1_4_R1.scheduler.CraftTask.run(CraftTask.java:53)
	at org.bukkit.craftbukkit.v1_4_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
	... 3 more

2013-02-16 14:23:52 [SEVERE] net.minecraft.server.v1_4_R1.ReportedException: Exception ticking world
2013-02-16 14:23:52 [SEVERE] 	at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:576)
2013-02-16 14:23:52 [SEVERE] 	at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
2013-02-16 14:23:52 [SEVERE] 	at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
2013-02-16 14:23:52 [SEVERE] 	at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
2013-02-16 14:23:52 [SEVERE] 	at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
2013-02-16 14:23:52 [SEVERE] Caused by: java.lang.IllegalStateException: TickNextTick list out of synch
2013-02-16 14:23:52 [SEVERE] 	at net.minecraft.server.v1_4_R1.WorldServer.a(WorldServer.java:456)
2013-02-16 14:23:52 [SEVERE] 	at net.minecraft.server.v1_4_R1.WorldServer.doTick(WorldServer.java:172)
2013-02-16 14:23:52 [SEVERE] 	at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:572)
2013-02-16 14:23:52 [SEVERE] 	... 4 more
2013-02-16 14:23:52 [SEVERE] Encountered an unexpected exception ReportedException
net.minecraft.server.v1_4_R1.ReportedException: Exception ticking world
	at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:576)
	at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
	at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
	at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
	at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.IllegalStateException: TickNextTick list out of synch
	at net.minecraft.server.v1_4_R1.WorldServer.a(WorldServer.java:456)
	at net.minecraft.server.v1_4_R1.WorldServer.doTick(WorldServer.java:172)
	at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:572)
	... 4 more