CraftBukkit 1.4.5 Error

Hello,
I've been having this error ever since I have updated to the "craftbukkit-1.4.5-R0.2" build. Basically, when I start the server it starts fine and then as soon as I enter the game a big "[SEVERE]" error occurs!

Here is what it looks like in my crash report file:

Code:

Time: 11/25/12 12:41 AM
Description: Ticking entity
 
java.lang.NullPointerException
    at org.bukkit.craftbukkit.inventory.CraftInventoryCrafting.setResult(CraftInventoryCrafting.java:126)
    at org.bukkit.craftbukkit.event.CraftEventFactory.callPreCraftEvent(CraftEventFactory.java:506)
    at net.minecraft.server.CraftingManager.craft(CraftingManager.java:274)
    at net.minecraft.server.EntitySheep.a(EntitySheep.java:210)
    at net.minecraft.server.EntitySheep.b(EntitySheep.java:173)
    at net.minecraft.server.EntitySheep.createChild(EntitySheep.java:227)
    at net.minecraft.server.PathfinderGoalBreed.g(PathfinderGoalBreed.java:68)
    at net.minecraft.server.PathfinderGoalBreed.e(PathfinderGoalBreed.java:45)
    at net.minecraft.server.PathfinderGoalSelector.a(PathfinderGoalSelector.java:104)
    at net.minecraft.server.EntityLiving.bl(EntityLiving.java:1422)
    at net.minecraft.server.EntitySheep.bl(EntitySheep.java:43)
    at net.minecraft.server.EntityLiving.c(EntityLiving.java:1224)
    at net.minecraft.server.EntityAgeable.c(EntityAgeable.java:58)
    at net.minecraft.server.EntityAnimal.c(SourceFile:33)
    at net.minecraft.server.EntitySheep.c(EntitySheep.java:51)
    at net.minecraft.server.EntityLiving.j_(EntityLiving.java:508)
    at net.minecraft.server.World.entityJoinedWorld(World.java:1333)
    at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:546)
    at net.minecraft.server.World.playerJoinedWorld(World.java:1315)
    at net.minecraft.server.World.tickEntities(World.java:1193)
    at net.minecraft.server.WorldServer.tickEntities(WorldServer.java:444)
    at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:577)
    at net.minecraft.server.DedicatedServer.r(DedicatedServer.java:222)
    at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:493)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:856)
 
 
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
 
-- Head --
Stacktrace:
    at org.bukkit.craftbukkit.inventory.CraftInventoryCrafting.setResult(CraftInventoryCrafting.java:126)
    at org.bukkit.craftbukkit.event.CraftEventFactory.callPreCraftEvent(CraftEventFactory.java:506)
    at net.minecraft.server.CraftingManager.craft(CraftingManager.java:274)
    at net.minecraft.server.EntitySheep.a(EntitySheep.java:210)
    at net.minecraft.server.EntitySheep.b(EntitySheep.java:173)
    at net.minecraft.server.EntitySheep.createChild(EntitySheep.java:227)
    at net.minecraft.server.PathfinderGoalBreed.g(PathfinderGoalBreed.java:68)
    at net.minecraft.server.PathfinderGoalBreed.e(PathfinderGoalBreed.java:45)
    at net.minecraft.server.PathfinderGoalSelector.a(PathfinderGoalSelector.java:104)
    at net.minecraft.server.EntityLiving.bl(EntityLiving.java:1422)
    at net.minecraft.server.EntitySheep.bl(EntitySheep.java:43)
    at net.minecraft.server.EntityLiving.c(EntityLiving.java:1224)
    at net.minecraft.server.EntityAgeable.c(EntityAgeable.java:58)
    at net.minecraft.server.EntityAnimal.c(SourceFile:33)
    at net.minecraft.server.EntitySheep.c(EntitySheep.java:51)
    at net.minecraft.server.EntityLiving.j_(EntityLiving.java:508)
    at net.minecraft.server.World.entityJoinedWorld(World.java:1333)
    at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:546)
    at net.minecraft.server.World.playerJoinedWorld(World.java:1315)
 
-- Entity being ticked --
Details:
    Entity Type: Sheep (net.minecraft.server.EntitySheep)
    Entity ID: 1168
    Name: Sheep
    Exact location: 17.41, 63.00, 284.50
    Block location: World: (17,63,284), Chunk: (at 1,3,12 in 1,17; contains blocks 16,0,272 to 31,255,287), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
    Momentum: -0.05, -0.08, 0.00
Stacktrace:
    at net.minecraft.server.World.tickEntities(World.java:1193)
    at net.minecraft.server.WorldServer.tickEntities(WorldServer.java:444)

Oh and I've tried running the server with no plugins as well and the error still occurs!

 

its coused by a sheep see:
Details:
Entity Type: Sheep (net.minecraft.server.EntitySheep)
Entity ID: 1168
Name: Sheep
Exact location: 17.41, 63.00, 284.50
Block location: World: (17,63,284), Chunk: (at 1,3,12 in 1,17; contains blocks 16,0,272 to 31,255,287), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Momentum: -0.05, -0.08, 0.00