Bukkit

I am running craftbukkit v 1.2.5-r1.0 and lumberjack v 1.3.1

On server start-up I get this error:

00:02:15 [INFO] [Lumberjack] Enabling Lumberjack v1.3
00:02:15 [INFO] [Lumberjack] Lumberjack enabled!
00:02:15 [SEVERE] Error occurred while enabling Lumberjack v1.3 (Is it up to dat
e?)
java.lang.NullPointerException
        at nl.mightydev.version.LumberjackVersion.equals(LumberjackVersion.java:
21)
        at nl.mightydev.lumberjack.player_data.PlayerDataReader.read(PlayerDataR
eader.java:43)
        at nl.mightydev.lumberjack.player_data.PlayerData.load(PlayerData.java:3
3)
        at nl.mightydev.lumberjack.Plugin.onEnable(Plugin.java:57)
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:215)
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader
.java:336)
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManage
r.java:381)
        at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:250)
        at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:232
)
        at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:371)
        at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:358)
        at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:187)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:422)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

Everything seems to work fine in the game, but just not sure why I am getting this :/

Not sure why it came out all blue lol