Quick Bench Error

2012-04-19 07:02:13 [SEVERE] Error occurred while enabling QuickBench v2.0 (Is it up to date?)
java.lang.IllegalArgumentException: Comparison method violates its general contract!
	at java.util.TimSort.mergeLo(Unknown Source)
	at java.util.TimSort.mergeAt(Unknown Source)
	at java.util.TimSort.mergeCollapse(Unknown Source)
	at java.util.TimSort.sort(Unknown Source)
	at java.util.TimSort.sort(Unknown Source)
	at java.util.Arrays.sort(Unknown Source)
	at java.util.Collections.sort(Unknown Source)
	at net.minecraft.server.CraftingManager.sort(CraftingManager.java:111)
	at org.bukkit.craftbukkit.CraftServer.addRecipe(CraftServer.java:980)
	at org.bukkit.Bukkit.addRecipe(Bukkit.java:206)
	at com.exphc.QuickBench.QuickBenchListener.loadRecipe(QuickBench.java:108)
	at com.exphc.QuickBench.QuickBenchListener.<init>(QuickBench.java:80)
	at com.exphc.QuickBench.QuickBench.onEnable(QuickBench.java:625)
	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:365)
	at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:351)
	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:333)
	at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:425)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:412)
	at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:226)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:480)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)