Bukkit

I will get this error every now and then while playing normally. I'm not giving it any commands when this happens. I get these errors every couple minutes now. Earlier there wasn't enough of them for me to even notice. The version is Feedback v0.1 / CB 1.4.6-R0.3.

Here's what comes to the console:
2013-02-19 06:40:10 [SEVERE] Could not pass event PlayerInteractEvent to Feedback v0.1
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
at org.bukkit.craftbukkit.v1_4_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:178)
at net.minecraft.server.v1_4_R1.PlayerInteractManager.interact(PlayerInteractManager.java:376)
at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java:657)
at net.minecraft.server.v1_4_R1.Packet15Place.handle(SourceFile:58)
at net.minecraft.server.v1_4_R1.NetworkManager.b(NetworkManager.java:290)
at net.minecraft.server.v1_4_R1.PlayerConnection.d(PlayerConnection.java:113)
at net.minecraft.server.v1_4_R1.ServerConnection.b(SourceFile:39)
at net.minecraft.server.v1_4_R1.DedicatedServerConnection.b(SourceFile:30)
at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:598)
at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.NullPointerException
at me.ienze.Feedback.PlayersHandler.onOpenBlockInventory(PlayersHandler.java:69)
at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
... 16 more

I'm uninstalling it now and telling the players to email the feedback to me.

Thanks for ticket, I will repair it soon

Can you try update server to 1.4.7 and download latest Feedback?

I can definitely confirm this error: whenever I open a dispenser, this error pops up. It's small and doesn't seem to affect gameplay at all, but it is nonetheless annoying to see in console.

What bukkit version are you using?

CraftBukkit 1.4.7 R1.0

And here's a paste:

http://pastebin.com/AMDT5uWw

Thanks for paste, I repaired it.. I will upload it soon