Bukkit

What steps will reproduce the problem?

Hitting mobs near a displayed item will cause this error..

What version of the product are you using?
ItemDisplay v.1.3
CraftBukkit 1.6.4

Do you have an error log of what happened?

[severe]  Could not pass event PlayerInteractEvent to ItemDisplay v1.3
[javastacktrace]     at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
[javastacktrace]     at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
[javastacktrace]     at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
[javastacktrace]     at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
[javastacktrace]     at org.bukkit.craftbukkit.v1_6_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:190)
[javastacktrace]     at net.minecraft.server.v1_6_R3.PlayerInteractManager.dig(PlayerInteractManager.java:108)
[javastacktrace]     at net.minecraft.server.v1_6_R3.PlayerConnection.a(PlayerConnection.java:539)
[javastacktrace]     at net.minecraft.server.v1_6_R3.Packet14BlockDig.handle(SourceFile:46)
[javastacktrace]     at net.minecraft.server.v1_6_R3.NetworkManager.b(NetworkManager.java:296)
[javastacktrace]     at net.minecraft.server.v1_6_R3.PlayerConnection.e(PlayerConnection.java:116)
[javastacktrace]     at net.minecraft.server.v1_6_R3.ServerConnection.b(SourceFile:37)
[javastacktrace]     at net.minecraft.server.v1_6_R3.DedicatedServerConnection.b(SourceFile:30)
javastacktrace]     at net.minecraft.server.v1_6_R3.MinecraftServer.t(MinecraftServer.java:592)
javastacktrace]     at net.minecraft.server.v1_6_R3.DedicatedServer.t(DedicatedServer.java:227)
[javastacktrace]     at net.minecraft.server.v1_6_R3.MinecraftServer.s(MinecraftServer.java:488)
[javastacktrace]     at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:421)
[javastacktrace]     at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583)
[javastacktrace] Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
[javastacktrace]     at java.util.ArrayList.rangeCheck(Unknown Source)
[javastacktrace]     at java.util.ArrayList.get(Unknown Source)
[javastacktrace]     at java.util.Collections$UnmodifiableList.get(Unknown Source)
[javastacktrace]     at me.kapetozo.itemdisplay.helpers.ItemDisplayListener.onPlayerLeftClick(ItemDisplayListener.java:44)
[javastacktrace]     at sun.reflect.GeneratedMethodAccessor122.invoke(Unknown Source)
[javastacktrace]     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[javastacktrace]     at java.lang.reflect.Method.invoke(Unknown Source)
[javastacktrace]     at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)

Please provide any additional information below.

I would appreciate it if you could update the plugin and fix this stacktrace error. Thank you.