2012-08-13 14:02:45 [SEVERE] Exception in thread "Thread-1029"
2012-08-13 14:02:45 [SEVERE] java.util.ConcurrentModificationException
2012-08-13 14:02:45 [SEVERE] 	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:977)
2012-08-13 14:02:45 [SEVERE] 	at java.util.HashMap$KeyIterator.next(HashMap.java:1012)
2012-08-13 14:02:45 [SEVERE] 	at org.bukkit.permissions.PermissibleBase.clearPermissions(PermissibleBase.java:168)
2012-08-13 14:02:45 [SEVERE] 	at org.bukkit.permissions.PermissibleBase.recalculatePermissions(PermissibleBase.java:150)
2012-08-13 14:02:45 [SEVERE] 	at org.bukkit.craftbukkit.entity.CraftHumanEntity.recalculatePermissions(CraftHumanEntity.java:126)
2012-08-13 14:02:45 [SEVERE] 	at net.minecraft.server.ServerConfigurationManagerAbstract.removeOp(ServerConfigurationManagerAbstract.java:573)
2012-08-13 14:02:45 [SEVERE] 	at net.minecraft.server.ServerConfigurationManager.removeOp(SourceFile:49)
2012-08-13 14:02:45 [SEVERE] 	at org.bukkit.craftbukkit.entity.CraftPlayer.setOp(CraftPlayer.java:79)
2012-08-13 14:02:45 [SEVERE] 	at com.wizardscraft.scripting.ScriptInterpreter.Interpret(ScriptInterpreter.java:1321)
2012-08-13 14:02:45 [SEVERE] 	at com.wizardscraft.scripting.ScriptInterpreter.run(ScriptInterpreter.java:228)
2012-08-13 14:02:45 [SEVERE] 	at java.lang.Thread.run(Thread.java:662)