2013-02-17 02:31:18 [SEVERE] Could not pass event SpoutCraftEnableEvent to SpoutEssentials v3.9.8
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
        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:462)
        at org.getspout.spout.PlayerChunkMap.onSpoutcraftEnable(PlayerChunkMap.java:96)
        at org.getspout.spout.SpoutPlayerConnection.a(SpoutPlayerConnection.java:130)
        at net.minecraft.server.v1_4_R1.Packet18ArmAnimation.handle(SourceFile:41)
        at net.minecraft.server.v1_4_R1.NetworkManager.b(NetworkManager.java:290)
        at net.minecraft.server.v1_4_R1.PlayerConnection.d(PlayerConnection.java:113)
        at org.getspout.spout.SpoutPlayerConnection.d(SpoutPlayerConnection.java:196)
        at net.minecraft.server.v1_4_R1.ServerConnection.b(SourceFile:39)
        at net.minecraft.server.v1_4_R1.DedicatedServerConnection.b(SourceFile:30)
        at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:598)
        at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
        at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
        at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
        at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.UnsupportedOperationException: All skins must be a PNG image
        at org.getspout.spout.player.SpoutCraftPlayer.checkUrl(SpoutCraftPlayer.java:872)
        at org.getspout.spout.player.SpoutCraftPlayer.setSkin(SpoutCraftPlayer.java:951)
        at me.skawke.spoutessentials.listeners.SpoutEssentialsSpoutListener.onSpoutCraftEnable(SpoutEssentialsSpoutListener.java:88)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.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:425)
        ... 16 more
2013-02-17 02:31:18 [INFO] [SpoutPlugin] Authenticated watar using Spoutcraft 1965