Bukkit

hi, with last bukkit dev 1340 and last spout for 1340 i receive this error

[SEVERE] Could not pass event PLAYER_INTERACT to Showcase
java.lang.NullPointerException
    at com.narrowtux.showcase.types.BuyAssistant.<init>(BuyAssistant.java:73)
    at com.narrowtux.showcase.types.InfiniteShowcaseExtra.onClick(InfiniteShowcaseExtra.java:40)
    at com.narrowtux.showcase.ShowcasePlayerListener.onPlayerInteract(ShowcasePlayerListener.java:100)
    at org.bukkit.plugin.java.JavaPluginLoader$11.execute(JavaPluginLoader.java:330)
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:339)
    at org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:171)
    at net.minecraft.server.ItemInWorldManager.dig(ItemInWorldManager.java:92)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:497)
    at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:160)
    at net.minecraft.server.Packet14BlockDig.a(SourceFile:43)
    at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:92)
    at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:500)
    at net.minecraft.server.NetworkListenThread.a(SourceFile:108)
    at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:471)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)

I am getting loads of PAYER_INTERACT errors in the console aswell...