Authme_spigot

2013-07-07 21:36:31 [INFO] JonHawk0 issued an AuthMe command!
2013-07-07 21:36:31 [SEVERE] Exception in thread "Craft Scheduler Thread - 12"
2013-07-07 21:36:31 [SEVERE] org.apache.commons.lang.UnhandledException: Plugin AuthMe v2.8 generated an exception while executing task 318
	at org.bukkit.craftbukkit.v1_6_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.IllegalStateException: Asynchronous entity world add!
	at net.minecraft.server.v1_6_R1.World.a(World.java:2481)
	at net.minecraft.server.v1_6_R1.Chunk.addEntities(Chunk.java:683)
	at net.minecraft.server.v1_6_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:128)
	at net.minecraft.server.v1_6_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:84)
	at org.bukkit.craftbukkit.v1_6_R1.CraftWorld.getChunkAt(CraftWorld.java:119)
	at org.bukkit.craftbukkit.v1_6_R1.CraftWorld.getBlockAt(CraftWorld.java:83)
	at org.bukkit.craftbukkit.v1_6_R1.CraftWorld.getBlockAt(CraftWorld.java:485)
	at org.bukkit.Location.getBlock(Location.java:82)
	at uk.org.whoami.authme.Utils.packCoords(Utils.java:130)
	at uk.org.whoami.authme.Management$1.run(Management.java:210)
	at org.bukkit.craftbukkit.v1_6_R1.scheduler.CraftTask.run(CraftTask.java:67)
	at org.bukkit.craftbukkit.v1_6_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
	... 3 more