TekkitRestrict Error - 20/10/12

20.10 23:06:43 [Server] INFO Please contact one of the authors of plugin 'tekkitrestrict':
20.10 23:06:43 [Server] INFO This error is logged only once: it could have occurred multiple times by now.
20.10 23:06:43 [Server] INFO at com.github.dreadslicer.tekkitrestrict.TWorldScrubber.run(TRThread.java:894)
20.10 23:06:43 [Server] INFO at com.github.dreadslicer.tekkitrestrict.TWorldScrubber.doWScrub(TRThread.java:953)
20.10 23:06:43 [Server] INFO at org.bukkit.craftbukkit.CraftChunk.getTileEntities(CraftChunk.java:117)
20.10 23:06:43 [Server] INFO at org.bukkit.craftbukkit.CraftWorld.getBlockAt(CraftWorld.java:69)
20.10 23:06:43 [Server] INFO at org.bukkit.craftbukkit.CraftWorld.getChunkAt(CraftWorld.java:105)
20.10 23:06:43 [Server] INFO at com.bergerkiller.bukkit.nolagg.examine.TimedChunkProviderServer.getChunkAt(TimedChunkProviderServer.java:147)
20.10 23:06:43 [Server] INFO at net.minecraft.server.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:111)
20.10 23:06:43 [Server] INFO at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:467)
20.10 23:06:43 [Server] INFO at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:482)
20.10 23:06:43 [Server] INFO at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
20.10 23:06:43 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302)
20.10 23:06:43 [Server] INFO at java.lang.reflect.Method.invoke(Unknown Source)
20.10 23:06:43 [Server] INFO at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
20.10 23:06:43 [Server] INFO at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source)
20.10 23:06:43 [Server] INFO at org.bukkit.event.Listener.onChunkLoad(Listener:0)
20.10 23:06:43 [Server] INFO java.lang.IllegalAccessError: Synchronized code got accessed from another thread: com.github.dreadslicer.tekkitrestrict.TWorldScrubber