Bukkit

What steps will reproduce the problem?
1. Playing on server.
2. Arbitrary fail.
3. Server goes down with error and a "READ TIME OUT".

What is the expected output? What do you see instead?
Nothing. Server crash.

What version of the product are you using?
1.1-R3

Do you have an error log of what happened?
2012-02-15 20:30:01 [SEVERE] java.lang.IndexOutOfBoundsException: Index: 5749, Size: 5749
2012-02-15 20:30:01 [SEVERE]    at java.util.ArrayList.rangeCheck(ArrayList.java:571)
2012-02-15 20:30:01 [SEVERE]    at java.util.ArrayList.get(ArrayList.java:349)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.Vec3D.create(SourceFile:28)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.Vec3D.add(SourceFile:81)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.BlockFluids.c(SourceFile:149)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.BlockFluids.a(SourceFile:171)
2012-02-15 20:30:01 [SEVERE]    at org.getspout.spout.block.mcblock.CustomBlock.a(CustomBlock.java:366)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.World.a(World.java:1445)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.Entity.i_(Entity.java:735)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.Entity.am(Entity.java:225)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.EntityLiving.am(EntityLiving.java:172)
2012-02-15 20:30:01 [SEVERE]    at org.martin.bukkit.npclib.NPCManager$1.run(NPCManager.java:48)
2012-02-15 20:30:01 [SEVERE]    at org.bukkit.craftbukkit.scheduler.CraftWorker.run(CraftWorker.java:34)
2012-02-15 20:30:01 [SEVERE]    at java.lang.Thread.run(Thread.java:636)
2012-02-15 20:30:01 [SEVERE] java.lang.IndexOutOfBoundsException: Index: 5750, Size: 5750
2012-02-15 20:30:01 [SEVERE]    at java.util.ArrayList.rangeCheck(ArrayList.java:571)
2012-02-15 20:30:01 [SEVERE]    at java.util.ArrayList.get(ArrayList.java:349)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.Vec3D.create(SourceFile:28)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.World.a(World.java:1433)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.Entity.i_(Entity.java:735)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.Entity.am(Entity.java:225)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.EntityLiving.am(EntityLiving.java:172)
2012-02-15 20:30:01 [SEVERE]    at org.martin.bukkit.npclib.NPCManager$1.run(NPCManager.java:48)
2012-02-15 20:30:01 [SEVERE]    at org.bukkit.craftbukkit.scheduler.CraftWorker.run(CraftWorker.java:34)
2012-02-15 20:30:01 [SEVERE]    at java.lang.Thread.run(Thread.java:636)
2012-02-15 20:30:01 [SEVERE] java.lang.IndexOutOfBoundsException: Index: 5748, Size: 5749
2012-02-15 20:30:01 [SEVERE]    at java.util.ArrayList.rangeCheck(ArrayList.java:571)
2012-02-15 20:30:01 [SEVERE]    at java.util.ArrayList.get(ArrayList.java:349)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.Vec3D.create(SourceFile:28)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.World.a(World.java:1433)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.Entity.i_(Entity.java:735)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.Entity.am(Entity.java:225)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.EntityLiving.am(EntityLiving.java:172)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.Entity.y_(Entity.java:195)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.EntityLiving.y_(EntityLiving.java:327)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.EntityMonster.y_(EntityMonster.java:31)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.World.entityJoinedWorld(World.java:1258)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:110)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.World.playerJoinedWorld(World.java:1240)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.World.tickEntities(World.java:1147)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:528)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:435)
2012-02-15 20:30:01 [SEVERE]    at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
2012-02-15 20:30:01 [SEVERE] Unexpected exception
java.lang.IndexOutOfBoundsException: Index: 5748, Size: 5749
        at java.util.ArrayList.rangeCheck(ArrayList.java:571)
        at java.util.ArrayList.get(ArrayList.java:349)
        at net.minecraft.server.Vec3D.create(SourceFile:28)
        at net.minecraft.server.World.a(World.java:1433)
        at net.minecraft.server.Entity.i_(Entity.java:735)
        at net.minecraft.server.Entity.am(Entity.java:225)
        at net.minecraft.server.EntityLiving.am(EntityLiving.java:172)
        at net.minecraft.server.Entity.y_(Entity.java:195)
        at net.minecraft.server.EntityLiving.y_(EntityLiving.java:327)
        at net.minecraft.server.EntityMonster.y_(EntityMonster.java:31)
        at net.minecraft.server.World.entityJoinedWorld(World.java:1258)
        at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:110)
        at net.minecraft.server.World.playerJoinedWorld(World.java:1240)
        at net.minecraft.server.World.tickEntities(World.java:1147)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:528)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:435)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)

Please provide any additional information below.
I think is problem of this plugin because is the only new installed plugin on my server and I had never experimented this type of crash ago. In the error log appears "npclib" so, I think is global bank.

Thank you for the plugin, and of course, your support.

Download the latest dev build here: http://dl.dropbox.com/u/19653570/GB/GlobalBank.jar
Please let me know if that fixes the issue.