[15:28:43] [Server thread/ERROR] [FML]: Exception caught during firing event cpw.mods.fml.common.gameevent.PlayerEvent$PlayerLoggedInEvent@3b75bea7:
java.lang.IllegalArgumentException: Equal objects must have equal hashcodes. During rehashing, Trove discovered that the following two objects claim to be equal (as in java.lang.Object.equals()) but their hashCodes (or those calculated by your TObjectHashingStrategy) are not equal.This violates the general contract of java.lang.Object.hashCode().  See bullet point two in that method's documentation. object #1 =class java.lang.Integer id= 1568289612 hashCode= 37904 toString= 37904; object #2 =class java.lang.Integer id= 1568289612 hashCode= 37904 toString= 37904

hashCode() and/or equals() have inconsistent implementation
Key set lost entries, now got 23388 instead of 23165. This can manifest itself as an apparent duplicate key.Inserting same object twice, rehashing bug. Object= 37904
	at gnu.trove.impl.hash.TObjectHash.buildObjectContractViolation(TObjectHash.java:464) ~[TObjectHash.class:3.0.3]
	at gnu.trove.impl.hash.TObjectHash.throwObjectContractViolation(TObjectHash.java:448) ~[TObjectHash.class:3.0.3]
	at gnu.trove.map.hash.THashMap.rehash(THashMap.java:403) ~[THashMap.class:3.0.3]
	at gnu.trove.impl.hash.THash.postInsertHook(THash.java:388) ~[THash.class:3.0.3]
	at gnu.trove.map.hash.THashMap.doPut(THashMap.java:178) ~[THashMap.class:3.0.3]
	at gnu.trove.map.hash.THashMap.put(THashMap.java:145) ~[THashMap.class:3.0.3]
	at cofh.core.util.oredict.OreDictionaryArbiter.registerOreDictionaryEntry(OreDictionaryArbiter.java:85) ~[OreDictionaryArbiter.class:?]
	at cofh.core.util.oredict.OreDictionaryArbiter.initialize(OreDictionaryArbiter.java:57) ~[OreDictionaryArbiter.class:?]
	at cofh.core.util.FMLEventHandler.handleIdMappingEvent(FMLEventHandler.java:47) ~[FMLEventHandler.class:?]
	at cofh.core.util.FMLEventHandler.onPlayerLogin(FMLEventHandler.java:38) ~[FMLEventHandler.class:?]
	at cpw.mods.fml.common.eventhandler.ASMEventHandler_133_FMLEventHandler_onPlayerLogin_PlayerLoggedInEvent.invoke(.dynamic) ~[?:?]
	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54) ~[ASMEventHandler.class:?]
	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140) ~[EventBus.class:?]
	at cpw.mods.fml.common.FMLCommonHandler.firePlayerLoggedIn(FMLCommonHandler.java:550) ~[FMLCommonHandler.class:?]
	at net.minecraft.server.management.ServerConfigurationManager.initializeConnectionToPlayer(ServerConfigurationManager.java:180) ~[oi.class:?]
	at cpw.mods.fml.common.network.handshake.NetworkDispatcher.completeServerSideConnection(NetworkDispatcher.java:190) ~[NetworkDispatcher.class:?]
	at cpw.mods.fml.common.network.handshake.NetworkDispatcher.completeHandshake(NetworkDispatcher.java:463) ~[NetworkDispatcher.class:?]
	at cpw.mods.fml.common.network.internal.HandshakeCompletionHandler.channelRead0(HandshakeCompletionHandler.java:17) ~[HandshakeCompletionHandler.class:?]
	at cpw.mods.fml.common.network.internal.HandshakeCompletionHandler.channelRead0(HandshakeCompletionHandler.java:11) ~[HandshakeCompletionHandler.class:?]
	at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) ~[SimpleChannelInboundHandler.class:?]
	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) ~[DefaultChannelHandlerContext.class:?]
	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) ~[DefaultChannelHandlerContext.class:?]
	at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[MessageToMessageDecoder.class:?]
	at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) ~[MessageToMessageCodec.class:?]
	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) ~[DefaultChannelHandlerContext.class:?]
	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) ~[DefaultChannelHandlerContext.class:?]
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785) ~[DefaultChannelPipeline.class:?]
	at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169) ~[EmbeddedChannel.class:?]
	at cpw.mods.fml.common.network.internal.FMLProxyPacket.func_148833_a(FMLProxyPacket.java:77) ~[FMLProxyPacket.class:?]
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212) ~[ej.class:?]
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165) ~[nc.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659) ~[MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) ~[MinecraftServer.class:?]
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:186) ~[bsx.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:396) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [?:?]