2011-07-22 09:32:49 [SEVERE] Could not pass event PLAYER_INTERACT to SignLift
java.lang.NullPointerException
    at org.bukkit.craftbukkit.block.CraftBlock.getState(CraftBlock.java:311)
    at au.net.fremnet.bukkit.SignLift.LiftSign.<init>(LiftSign.java:43)
    at au.net.fremnet.bukkit.SignLift.SignLiftPlayerListener.onPlayerInteract(SignLiftPlayerListener.java:57)
    at org.bukkit.plugin.java.JavaPluginLoader$10.execute(JavaPluginLoader.java:307)
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:321)
    at org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:168)
    at net.minecraft.server.ItemInWorldManager.interact(ItemInWorldManager.java:210)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:552)
    at net.minecraft.server.Packet15Place.a(SourceFile:57)
    at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:84)
    at net.minecraft.server.NetworkListenThread.a(SourceFile:105)
    at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:457)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:367)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)