2013-09-21 17:35:44 [SEVERE] Could not load 'plugins/RebalanceVillagers.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: net/minecraft/server/v1_6_R2/World
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:184)
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:306)
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:230)
	at org.bukkit.craftbukkit.v1_6_R3.CraftServer.loadPlugins(CraftServer.java:243)
	at net.minecraft.server.v1_6_R3.DedicatedServer.init(DedicatedServer.java:118)
	at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:399)
	at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/v1_6_R2/World
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Unknown Source)
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:173)
	... 6 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_6_R2.World
	at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:70)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 9 more