2013-09-15 13:50:47 [SEVERE] org.apache.commons.lang.UnhandledException: Plugin AuthMe v2.9.4 generated an exception while executing task 1129
	at org.bukkit.craftbukkit.v1_6_R2.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.util.ConcurrentModificationException
	at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
	at java.util.ArrayList$Itr.next(Unknown Source)
	at org.yaml.snakeyaml.serializer.Serializer.serializeNode(Serializer.java:190)
	at org.yaml.snakeyaml.serializer.Serializer.serializeNode(Serializer.java:207)
	at org.yaml.snakeyaml.serializer.Serializer.serialize(Serializer.java:112)
	at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:272)
	at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:262)
	at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:234)
	at org.yaml.snakeyaml.Yaml.dump(Yaml.java:209)
	at org.bukkit.configuration.file.YamlConfiguration.saveToString(YamlConfiguration.java:38)
	at org.bukkit.configuration.file.FileConfiguration.save(FileConfiguration.java:54)
	at uk.org.whoami.authme.settings.CustomConfiguration.save(CustomConfiguration.java:52)
	at uk.org.whoami.authme.Management$1.run(Management.java:322)
	at org.bukkit.craftbukkit.v1_6_R2.scheduler.CraftTask.run(CraftTask.java:58)
	at org.bukkit.craftbukkit.v1_6_R2.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
	... 3 more