java.lang.IndexOutOfBoundsException: Index: 78971, Size: 78971
	at java.util.ArrayList.RangeCheck(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at net.minecraft.src.Vec3D.createVector(Vec3D.java:61)
	at net.minecraft.src.Vec3D.addVector(Vec3D.java:133)
	at net.minecraft.src.BlockFluidLAPI.getFlowVector(BlockFluidLAPI.java:232)
	at net.minecraft.src.BlockFluidLAPI.velocityToAddToEntity(BlockFluidLAPI.java:282)
	at net.minecraft.src.World.handleMaterialAcceleration(World.java:2395)
	at net.minecraft.src.Entity.handleWaterMovement(Entity.java:1003)
	at net.minecraft.src.Entity.onEntityUpdate(Entity.java:386)
	at net.minecraft.src.EntityLiving.onEntityUpdate(EntityLiving.java:424)
	at net.minecraft.src.Entity.onUpdate(Entity.java:349)
	at net.minecraft.src.EntityLiving.onUpdate(EntityLiving.java:636)
	at net.minecraft.src.EntityMob.onUpdate(EntityMob.java:35)
	at net.minecraft.src.EntitySpider.onUpdate(EntitySpider.java:33)
	at net.minecraft.src.World.updateEntityWithOptionalForce(World.java:2182)
	at net.minecraft.src.World.updateEntity(World.java:2153)
	at net.minecraft.src.World.updateEntities(World.java:2039)
	at net.minecraft.client.Minecraft.runTick(Minecraft.java:1861)
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:819)
	at net.minecraft.client.Minecraft.run(Minecraft.java:747)
	at java.lang.Thread.run(Unknown Source)
Stopping!