2012-08-02 13:09:25 [SEVERE] java.lang.Exception: Field 'u' does not exist in class file 'World'!
2012-08-02 13:09:25 [SEVERE] 	at com.bergerkiller.bukkit.common.SafeField.<init>(SafeField.java:25)
2012-08-02 13:09:25 [SEVERE] 	at com.bergerkiller.bukkit.common.WorldListener.<clinit>(WorldListener.java:19)
2012-08-02 13:09:25 [SEVERE] 	at com.bergerkiller.bukkit.nolagg.itemstacker.StackFormer.init(StackFormer.java:49)
2012-08-02 13:09:25 [SEVERE] 	at com.bergerkiller.bukkit.nolagg.itemstacker.NoLaggItemStacker.onEnable(NoLaggItemStacker.java:80)
2012-08-02 13:09:25 [SEVERE] 	at com.bergerkiller.bukkit.nolagg.NoLaggComponent.enable(NoLaggComponent.java:59)
2012-08-02 13:09:25 [SEVERE] 	at com.bergerkiller.bukkit.nolagg.NoLagg.enable(NoLagg.java:49)
2012-08-02 13:09:25 [SEVERE] 	at com.bergerkiller.bukkit.common.PluginBase.onEnable(PluginBase.java:179)
2012-08-02 13:09:25 [SEVERE] 	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
2012-08-02 13:09:25 [SEVERE] 	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337)
2012-08-02 13:09:25 [SEVERE] 	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
2012-08-02 13:09:25 [SEVERE] 	at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:263)
2012-08-02 13:09:25 [SEVERE] 	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:245)
2012-08-02 13:09:25 [SEVERE] 	at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer.java:197)
2012-08-02 13:09:25 [SEVERE] 	at net.minecraft.server.ServerConfigurationManagerAbstract.<init>(ServerConfigurationManagerAbstract.java:50)
2012-08-02 13:09:25 [SEVERE] 	at net.minecraft.server.ServerConfigurationManager.<init>(SourceFile:11)
2012-08-02 13:09:25 [SEVERE] 	at net.minecraft.server.DedicatedServer.init(DedicatedServer.java:105)
2012-08-02 13:09:25 [SEVERE] 	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:376)
2012-08-02 13:09:25 [SEVERE] 	at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
2012-08-02 13:09:25 [WARNING] [NoLagg ItemStacker] Failed to hook into world access listeners, will use a slower alternative!
2012-08-02 13:09:25 [SEVERE] [NoLagg SpawnLimiter] Failed to initialize spawn limiter: could not bind to world entity listener
2012-08-02 13:09:25 [INFO] [NoLagg Saving] will write world data to all region files every 12000 ticks (10.0 minutes)
2012-08-02 13:09:25 [SEVERE] [NoLagg Saving] Failed to bind to the field to enable Auto-save interval changer!