2012-09-23 10:05:23 [SEVERE] Could not pass event AsyncPlayerChatEvent to EndSwear
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:332)
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:459)
    at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:830)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:807)
    at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:44)
    at net.minecraft.server.NetworkManager.i(NetworkManager.java:211)
    at net.minecraft.server.NetworkManager.c(NetworkManager.java:326)
    at net.minecraft.server.NetworkReaderThread.run(SourceFile:93)
Caused by: java.lang.UnsupportedOperationException
    at java.util.AbstractList.remove(Unknown Source)
    at java.util.AbstractList$Itr.remove(Unknown Source)
    at java.util.AbstractCollection.remove(Unknown Source)
    at me.FreeSpace2.EndSwear.ThreadedTalkListener.onPlayerChat(ThreadedTalkListener.java:36)
    at sun.reflect.GeneratedMethodAccessor662.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:330)
    ... 9 more