Bukkit

Just to let you know:

17:51:26 [SEVERE] Could not pass event BlockDispenseEvent to BetterDispensers
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:332)
        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 net.minecraft.server.BlockDispenser.dispense(BlockDispenser.java:125)
        at net.minecraft.server.BlockDispenser.b(BlockDispenser.java:193)
        at net.minecraft.server.WorldServer.a(WorldServer.java:449)
        at net.minecraft.server.WorldServer.doTick(WorldServer.java:168)
        at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:558)
        at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:212)
        at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
Caused by: java.lang.NoSuchMethodError: net.minecraft.server.TileEntityDispenser.findDispenseSlot()I
        at me.exphc.BetterDispensers.BetterDispensersListener.onBlockDispense(BetterDispensers.java:664)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:330)
        ... 12 more