Bukkit

On CB 1564:

08:48:34 [SEVERE] Could not pass event PLAYER_INTERACT to Showcase
java.lang.NullPointerException
        at com.narrowtux.showcase.ShowcasePlayerListener.onPlayerInteract(ShowcasePlayerListener.java:43)
        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:178)
        at net.minecraft.server.ItemInWorldManager.interact(ItemInWorldManager.java:266)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:592)
        at net.minecraft.server.Packet15Place.a(SourceFile:39)
        at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:92)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:108)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:521)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:419)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)