DisguiseCraft Crash/Fail

12:02:55 [SEVERE] [DisguiseCraft] Unable to set the metadata for a player disguise!
java.lang.NoSuchFieldException: i
        at java.lang.Class.getDeclaredField(Class.java:1948)
        at pgDev.bukkit.DisguiseCraft.packet.DCPacketGenerator.getPlayerSpawnPacket(DCPacketGenerator.java:141)
        at pgDev.bukkit.DisguiseCraft.packet.DCPacketGenerator.getSpawnPacket(DCPacketGenerator.java:53)
        at pgDev.bukkit.DisguiseCraft.DisguiseCraft$4.run(DisguiseCraft.java:515)
        at pgDev.bukkit.DisguiseCraft.DisguiseCraft.disguiseToPlayer(DisguiseCraft.java:535)
        at pgDev.bukkit.DisguiseCraft.DisguiseCraft.showWorldDisguises(DisguiseCraft.java:677)
        at pgDev.bukkit.DisguiseCraft.listeners.DCMainListener.onPlayerJoin(DCMainListener.java:34)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:435)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
        at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:31)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:479)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:464)
        at net.minecraft.server.management.ServerConfigurationManager.func_72377_c(ServerConfigurationManager.java:325)
        at net.minecraft.server.management.ServerConfigurationManager.func_72355_a(ServerConfigurationManager.java:186)
        at net.minecraft.network.NetLoginHandler.completeConnection(NetLoginHandler.java:223)
        at cpw.mods.fml.common.network.FMLNetworkHandler.handleClientConnection(FMLNetworkHandler.java:168)
        at cpw.mods.fml.common.network.FMLNetworkHandler.onConnectionReceivedFromClient(FMLNetworkHandler.java:121)
        at net.minecraft.network.NetLoginHandler.func_72529_d(NetLoginHandler.java:198)
        at net.minecraft.network.NetLoginHandler.func_72532_c(NetLoginHandler.java:82)
        at net.minecraft.server.ServerListenThread.func_71766_a(ServerListenThread.java:57)
        at net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747_b(DedicatedServerListenThread.java:33)
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:910)
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:330)
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:777)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:659)
        at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)