2012-04-11 05:37:33 [SEVERE] Error occurred while enabling CommandBook v467-5cd3f24 (Is it up to date?)
java.lang.NoSuchMethodError: com.sk89q.minecraft.util.commands.Command.help()Ljava/lang/String;
        at com.sk89q.minecraft.util.commands.CommandsManager.registerMethods(CommandsManager.java:214)
        at com.sk89q.minecraft.util.commands.CommandsManager.registerMethods(CommandsManager.java:144)
        at com.sk89q.minecraft.util.commands.CommandsManager.registerAndReturn(CommandsManager.java:127)
        at com.sk89q.bukkit.util.CommandsManagerRegistration.register(CommandsManagerRegistration.java:49)
        at com.zachsthings.libcomponents.bukkit.BukkitComponent.registerCommands(BukkitComponent.java:70)
        at com.sk89q.commandbook.session.SessionComponent.enable(SessionComponent.java:65)
        at com.zachsthings.libcomponents.ComponentManager.enableComponents(ComponentManager.java:66)
        at com.zachsthings.libcomponents.bukkit.BasePlugin.onEnable(BasePlugin.java:98)
        at com.sk89q.commandbook.CommandBook.onEnable(CommandBook.java:96)
        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(SimplePluginManager.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)
2012-04-11 05:37:39 [SEVERE] Error occurred while disabling WorldEdit v5.3 (Is it up to date?)
java.lang.NullPointerException
        at com.sk89q.worldedit.bukkit.WorldEditPlugin.onDisable(WorldEditPlugin.java:127)
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
        at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:362)
        at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:399)
        at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:392)
        at org.bukkit.craftbukkit.CraftServer.disablePlugins(CraftServer.java:245)
        at net.minecraft.server.MinecraftServer.stop(MinecraftServer.java:399)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:479)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
2012-04-11 05:37:34 [SEVERE] Error occurred while enabling WorldGuard v5.5.2-SNAPSHOT (Is it up to date?)
java.lang.NoSuchMethodError: com.sk89q.minecraft.util.commands.Command.help()Ljava/lang/String;
        at com.sk89q.minecraft.util.commands.CommandsManager.registerMethods(CommandsManager.java:214)
        at com.sk89q.minecraft.util.commands.CommandsManager.registerMethods(CommandsManager.java:144)
        at com.sk89q.minecraft.util.commands.CommandsManager.registerAndReturn(CommandsManager.java:127)
        at com.sk89q.bukkit.util.CommandsManagerRegistration.register(CommandsManagerRegistration.java:49)
        at com.sk89q.worldguard.bukkit.WorldGuardPlugin.onEnable(WorldGuardPlugin.java:116)
        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(SimplePluginManager.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)