Bukkit

What steps will reproduce the problem?
1. Using a gold tool such as a gold pick.

What is the expected output? What do you see instead?  Expected, tool smelts cobble to stone, etc.  Actually, tool works normally, console errors occur.

What version of the product are you using? Latest version as of 4/9/12 - with craftbukkit recommended for 1.2.4

Do you have an error log of what happened?

06:17:22 [SEVERE] Could not pass event BlockBreakEvent to firelord
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:303)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:459)
        at net.minecraft.server.ItemInWorldManager.breakBlock(ItemInWorldManager.java:220)
        at net.minecraft.server.ItemInWorldManager.a(ItemInWorldManager.java:175)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:540)
        at net.minecraft.serverhook.NetServerHandlerProxy.a(NetServerHandlerProxy.java:114)
        at net.minecraft.server.Packet14BlockDig.handle(SourceFile:43)
        at net.minecraft.server.NetworkManager.b(NetworkManager.java:229)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:113)
        at net.minecraft.serverhook.NetServerHandlerProxy.a(NetServerHandlerProxy.java:83)
        at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:554)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:452)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)
Caused by: java.lang.NoSuchMethodError: org.bukkit.event.block.BlockBreakEvent.getDrops()Ljava/util/List;
        at firelord.perks.FireTools.smeltBlock(FireTools.java:170)
        at firelord.perks.FireTools.onBlockBreak(FireTools.java:78)
        at sun.reflect.GeneratedMethodAccessor119.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301)
        ... 14 more

Please provide any additional information below.

Firelord armor is working fine - I have all the PvP related firelord stuff disabled.