I don't know but while trying to upgrade to 1.0 build I'm getting this error and when I break a ps block it kicks me out of the server and says Internal Server Error and in console it says [Warning] Failed to handle packet: java.lang.NullPointerException.

Please help!

Thanks,

I got it too, I'm using Bukkit Build #1497 and PreciousStones v. 7.0.5.

15:32:53 [SEVERE] Could not pass event BLOCK_BREAK to PreciousStones
java.lang.NullPointerException
at net.sacredlabyrinth.Phaed.PreciousStones.managers.ForceFieldManager.deleteField(ForceFieldManager.java:333)
at net.sacredlabyrinth.Phaed.PreciousStones.managers.ForceFieldManager.release(ForceFieldManager.java:2036)
at net.sacredlabyrinth.Phaed.PreciousStones.listeners.PSBlockListener.onBlockBreak(PSBlockListener.java:297)
at org.bukkit.plugin.java.JavaPluginLoader$40.execute(JavaPluginLoader.java:534)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:339)
at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:201)
at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:81)
at net.minecraft.server.EntityPlayer.w_(EntityPlayer.java:132)
at net.minecraft.server.World.entityJoinedWorld(World.java:1251)
at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:104)
at net.minecraft.server.World.playerJoinedWorld(World.java:1233)
at net.minecraft.server.World.tickEntities(World.java:1140)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:507)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:414)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
15:32:53 [SEVERE] java.lang.NullPointerException
15:32:53 [SEVERE] at net.minecraft.server.InventoryPlayer.b(InventoryPlayer.java:315)
15:32:53 [SEVERE] at net.minecraft.server.EntityHuman.b(EntityHuman.java:476)
15:32:53 [SEVERE] at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:219)
15:32:53 [SEVERE] at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:81)
15:32:53 [SEVERE] at net.minecraft.server.EntityPlayer.w_(EntityPlayer.java:132)
15:32:53 [SEVERE] at net.minecraft.server.World.entityJoinedWorld(World.java:1251)
15:32:53 [SEVERE] at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:104)
15:32:53 [SEVERE] at net.minecraft.server.World.playerJoinedWorld(World.java:1233)
15:32:53 [SEVERE] at net.minecraft.server.World.tickEntities(World.java:1140)
15:32:53 [SEVERE] at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:507)
15:32:53 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:414)
15:32:53 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
15:32:53 [SEVERE] Unexpected exception
java.lang.NullPointerException
at net.minecraft.server.InventoryPlayer.b(InventoryPlayer.java:315)
at net.minecraft.server.EntityHuman.b(EntityHuman.java:476)
at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:219)
at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:81)
at net.minecraft.server.EntityPlayer.w_(EntityPlayer.java:132)
at net.minecraft.server.World.entityJoinedWorld(World.java:1251)
at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:104)
at net.minecraft.server.World.playerJoinedWorld(World.java:1233)
at net.minecraft.server.World.tickEntities(World.java:1140)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:507)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:414)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)

Funny I found out its only happening on Windows not on Linux

Running Linux here, (both server environment and clientside) and still getting the same issue.
Most assuredly not a windows only glitch.

Anyone have any news on a fix?

I'm running Mac OS X 10.6.8 for both server and client.

Fixed in 7.2

I am having the same problem... I can delete the mod that's causing it... Please help! This is my error: [Switched out name with PLAYERNAME and IP with 0.0.0.0]
I have the following mods:
CodeChickenCore{0.9.0.3} CodeChicken Core Unloaded->Constructed->Pre-initialized
Micdoodlecore{} Micdoodle8 Core Unloaded->Constructed->Pre-initialized
NotEnoughItems{1.6.0.7} [Not Enough Items](NotEnoughItems 1.6.0.7.jar) Unloaded->Constructed->Pre-initialized
craftablespawners{2.0} Craftable Spawners Unloaded->Constructed->Pre-initialized
mod_Airships{Bmanrules' Airships} mod_Airships Unloaded->Constructed->Pre-initialized
AlchemyPlusPlus{release 1.0} Alchemy++ Unloaded->Constructed->Pre-initialized
mod_AncientDimensionMod{1.6.2} mod_AncientDimensionMod Unloaded->Constructed->Pre-initialized
IC2{1.118.400-lf} [IndustrialCraft 2](Industrial-Craft-2-Mod-1.6.2 %281%29.jar) Unloaded->Constructed->Pre-initialized
AtomicScience{0.7.0} Atomic Science Unloaded->Constructed->Pre-initialized
iChunUtil{2.0.0} iChunUtil Unloaded->Constructed->Pre-initialized
Grinder{2.0.0} Grinder Unloaded->Constructed->Pre-initialized
Backpack{1.12.13} Backpack Unloaded->Constructed->Pre-initialized
BoatCraft{1.0.2} BoatCraft Unloaded->Constructed->Pre-initialized
BrewingAPI{1.6.2} [Brewing API](BrewingAPI 1.6.2-3.zip) Unloaded->Constructed->Pre-initialized
BuildCraft|Core{4.0.2} [BuildCraft](BuildCraft-Mod-1.6.2 %281%29.jar) Unloaded->Constructed->Pre-initialized
BuildCraft|Builders{4.0.2} [BC Builders](BuildCraft-Mod-1.6.2 %281%29.jar) Unloaded->Constructed->Pre-initialized
BuildCraft|Energy{4.0.2} [BC Energy](BuildCraft-Mod-1.6.2 %281%29.jar) Unloaded->Constructed->Pre-initialized
BuildCraft|Factory{4.0.2} [BC Factory](BuildCraft-Mod-1.6.2 %281%29.jar) Unloaded->Constructed->Pre-initialized
BuildCraft|Transport{4.0.2} [BC Transport](BuildCraft-Mod-1.6.2 %281%29.jar) Unloaded->Constructed->Pre-initialized
BuildCraft|Silicon{4.0.2} [BC Silicon](BuildCraft-Mod-1.6.2 %281%29.jar) Unloaded->Constructed->Pre-initialized
BurningWarMod{III-B} Burning War Mod Unloaded->Constructed->Pre-initialized
ChestTransporter{1.1.7} Chest Transporter Unloaded->Constructed->Pre-initialized
ChickenChunks{1.3.3.1} [ChickenChunks](ChickenChunks 1.3.3.1.jar) Unloaded->Constructed->Pre-initialized
ClashsoftAPI{1.6.2} [Clashsoft API](ClashsoftAPI 1.6.2-3.zip) Unloaded->Constructed->Pre-initialized
ColaCraft{Alpha} Coca Cola Mod Unloaded->Constructed->Pre-initialized
ComputerCraft{1.55} ComputerCraft Unloaded->Constructed->Pre-initialized
CCTurtle{1.55} ComputerCraft Turtles Unloaded->Constructed->Pre-initialized
mod_CraftableBedrock{1.6.2} mod_CraftableBedrock Unloaded->Constructed->Pre-initialized
SKC-CraftableHorseArmor{1.0.1} Craftable Horse Armor Unloaded->Constructed->Pre-initialized
CyanSwords{1.6.0} Cyan Warrior Swords Unloaded->Constructed->Pre-initialized
EndOres{v1} End Ores Unloaded->Constructed->Pre-initialized
EnderStorage{1.4.3.1} [EnderStorage](EnderStorage 1.4.3.1.jar) Unloaded->Constructed->Pre-initialized
Explodables{1.8} Explodables Unloaded->Constructed->Pre-initialized
meteors{2.11.1} Falling Meteors Unloaded->Constructed->Pre-initialized
FerullosMods{2.8.5} Ferullo's Mods Unloaded->Constructed->Pre-initialized
FruitCraftory{1.6.1} FruitCraftory Unloaded->Constructed->Pre-initialized
GalacticraftCore{0.1.38} Galacticraft Core Unloaded->Constructed->Pre-initialized
GalaxyWarfare{v1.0.0} Galaxy Warfare Unloaded->Constructed->Pre-initialized
mod_GravityControl{Version 9001} [Gravity Controller](Gravity Control v1 1.6.2.zip) Unloaded->Constructed->Pre-initialized
GraviGun{2.0.0} GraviGun Unloaded->Constructed->Pre-initialized
SGCraft{0.6.0} SG Craft Unloaded->Constructed->Pre-initialized
ICBM|Contraption{1.3.0} ICBM|Contraption Unloaded->Constructed->Pre-initialized
ICBM|Sentry{1.3.0} ICBM|Sentry Unloaded->Constructed->Pre-initialized
inventorytweaks{1.56} Inventory Tweaks Unloaded->Constructed->Pre-initialized
KeithyUtils{1.2} Keithy Utils Unloaded->Constructed->Pre-initialized
magicalcrops{3.0.1 BETA} Magical Crops Unloaded->Constructed->Pre-initialized
Mekanism{5.5.7} Mekanism Unloaded->Constructed->Pre-initialized
MekanismGenerators{5.5.7} MekanismGenerators Unloaded->Constructed->Pre-initialized
MekanismTools{5.5.7} MekanismTools Unloaded->Constructed->Pre-initialized
MFFS{3.2.0} Modular Force Field System Unloaded->Constructed->Pre-initialized
minegicka{1.4.1} [Minegicka 2](Minegicka II 1.4.1 for MC1.6.2.zip) Unloaded->Constructed->Pre-initialized
More Bows{1.5_v1} [More Bows mod](More bows 1.6.2.jar) Unloaded->Constructed->Pre-initialized
MorePotionsMod{1.6.2} [More Potions Mod](More Potions Mod 1.6.2-5.zip) Unloaded->Constructed->Pre-initialized
MoreMachinery{1.1.0} More Machinery Unloaded->Constructed->Pre-initialized
Paintball{1.6.2v1} Paintball Unloaded->Constructed->Pre-initialized
ClaySpawn{1.5} [Pam's Clay Spawn](Pam's Clay Spawn 1.6.2.zip) Unloaded->Constructed->Pre-initialized
pamdesertcraft{1.0} [Pam's DesertCraft](Pam's DesertCraft 1.6.2.zip) Unloaded->Constructed->Pre-initialized
pamextendedglass{1.0} [Pam's Extended Glass](Pam's Extended Glass 1.6.2.zip) Unloaded->Constructed->Pre-initialized
GetAllTheSeeds{1.6} [Pam's Get all the Seeds!](Pam's Get all the Seeds 1.6.2.zip) Unloaded->Constructed->Pre-initialized
MushroomSpawn{1.3} [Pam's Huge Mushroom Spawn](Pam's Huge Mushroom Spawn 1.6.2.zip) Unloaded->Constructed->Pre-initialized
MelonSpawn{1.5} [Pam's Melon Spawn](Pam's Melon Spawn 1.6.2.zip) Unloaded->Constructed->Pre-initialized
SimpleRecipes{1.9} [Pam's Simple Recipes](Pam's Simple Recipes 1.6.2.zip) Unloaded->Constructed->Pre-initialized
pamtemperateplants{1.0} [Pam's TemperatePlants](Pam's Temperate Plants 1.6.2.zip) Unloaded->Constructed->Pre-initialized
ParachuteMod{1.6.2} Parachute Mod Unloaded->Constructed->Pre-initialized
PortalGun{2.0.0} PortalGun Unloaded->Constructed->Pre-initialized
POTE{1.1.1} Power of the Elements Unloaded->Constructed->Pre-initialized
RedStoneHandGuns{Beta} RedStoneGuns Unloaded->Constructed->Pre-initialized
mod_SavannaBiomeMod{1.6.2} mod_SavannaBiomeMod Unloaded->Constructed->Pre-initialized
Super_Heroes{1.5} Super Heroes Mod Unloaded->Constructed->Pre-initialized
simplethings{0.1} Simple Things Unloaded->Constructed->Pre-initialized
Skorpio's Washing Machine Mod{1.0} [Skorpio's Washing Machine Mod](Skorpios WashingMachine Mod 1.6.1 v1.0.zip) Unloaded->Constructed->Pre-initialized
slabcraftmod{1.5} Slabcraft Unloaded->Constructed->Pre-initialized
TLSpecialArmor{1.6.2} SpecialArmor Unloaded->Constructed->Pre-initialized
StevesCarts{2.0.0.a125} [Steve's Carts 2](StevesCarts2.0.0.a125 %281%29.zip) Unloaded->Constructed->Pre-initialized
TConstruct{1.6.2_1.4.dev.24} Tinkers' Construct Unloaded->Constructed->Pre-initialized
TConstruct|CompatMineFactoryReloaded{0.1} TConstruct Compat: MFR Unloaded->Constructed->Pre-initialized
TF2Dispenser{1.6.2} TF2 Dispenser Unloaded->Constructed->Pre-initialized
TF2Sentry{1.6.2} TF2 Sentry Unloaded->Constructed->Pre-initialized
TF2TeamAddon{1.6.1} TF2 TeamAddon Unloaded->Constructed->Pre-initialized
TF2Teleporter{1.6.2} TF2 Teleporter Unloaded->Constructed->Pre-initialized
TwilightForest{1.19.0} The Twilight Forest Unloaded->Constructed->Pre-initialized
weaponmod{1.6.2 v1.13.3} Balkon's WeaponMod Unloaded->Constructed->Pre-initialized
BasicComponents{1.0.0} Basic Components Unloaded->Constructed->Pre-initialized
HERE'S THE ERROR I GET IN THE CONSOLE:
16:29:46 [WARNING] Failed to handle packet for PLAYERNAME/0.0.0.0: java.lang.
NullPointerException
java.lang.NullPointerException
at net.minecraft.item.ItemInWorldManager.func_73079_d(ItemInWorldManager
.java:337)
at net.minecraft.item.ItemInWorldManager.func_73084_b(ItemInWorldManager
.java:445)
at net.minecraft.item.ItemInWorldManager.func_73074_a(ItemInWorldManager
.java:194)
at net.minecraft.network.NetServerHandler.func_72510_a(NetServerHandler.
java:748)
at net.minecraft.network.packet.Packet14BlockDig.func_73279_a(Packet14Bl
ockDig.java:67)
at net.minecraft.network.TcpConnection.func_74428_b(TcpConnection.java:4
69)
at net.minecraft.network.NetServerHandler.func_72570_d(NetServerHandler.
java:231)
at net.minecraft.network.NetworkListenThread.func_71747_b(NetworkListenT
hread.java:54)
at net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747
_b(DedicatedServerListenThread.java:34)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.jav
a:888)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(Dedicated
Server.java:327)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.jav
a:757)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:641)
at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.
java:16)
I get an "Internal Server Error" on Minecraft

Me too.

2012-01-07 02:40:58 [INFO] [PreciousStones] shipp07 placed a Air of Atlantis field [LAPIS_ORE|858 72 -4,463]
2012-01-07 02:41:00 [SEVERE] Could not pass event BLOCK_BREAK to PreciousStones
java.lang.NullPointerException
at net.sacredlabyrinth.Phaed.PreciousStones.managers.ForceFieldManager.deleteField(ForceFieldManager.java:333)
at net.sacredlabyrinth.Phaed.PreciousStones.managers.ForceFieldManager.release(ForceFieldManager.java:2023)
at net.sacredlabyrinth.Phaed.PreciousStones.listeners.PSBlockListener.onBlockBreak(PSBlockListener.java:296)
at org.bukkit.plugin.java.JavaPluginLoader$40.execute(JavaPluginLoader.java:539)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:339)
at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:201)
at net.minecraft.server.ItemInWorldManager.a(ItemInWorldManager.java:165)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:501)
at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:208)
at net.minecraft.server.Packet14BlockDig.a(SourceFile:43)
at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:93)
at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:550)
at net.minecraft.server.NetworkListenThread.a(SourceFile:108)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:527)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
2012-01-07 02:41:01 [INFO] ~TOBY>mem] will that stop greifers as well?
2012-01-07 02:41:15 [INFO] [PreciousStones] shipp07 placed a Air of Atlantis field [LAPIS_ORE|860 72 -4,463]
2012-01-07 02:41:18 [SEVERE] Could not pass event BLOCK_BREAK to PreciousStones
java.lang.NullPointerException
at net.sacredlabyrinth.Phaed.PreciousStones.managers.ForceFieldManager.deleteField(ForceFieldManager.java:333)
at net.sacredlabyrinth.Phaed.PreciousStones.managers.ForceFieldManager.release(ForceFieldManager.java:2023)
at net.sacredlabyrinth.Phaed.PreciousStones.listeners.PSBlockListener.onBlockBreak(PSBlockListener.java:296)
at org.bukkit.plugin.java.JavaPluginLoader$40.execute(JavaPluginLoader.java:539)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:339)
at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:201)
at net.minecraft.server.ItemInWorldManager.a(ItemInWorldManager.java:165)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:501)
at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:208)
at net.minecraft.server.Packet14BlockDig.a(SourceFile:43)
at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:93)
at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:550)
at net.minecraft.server.NetworkListenThread.a(SourceFile:108)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:527)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
2012-01-07 02:41:21 [INFO] [PreciousStones] shipp07 placed a Air of Atlantis field [LAPIS_ORE|860 72 -4,463]
2012-01-07 02:41:23 [INFO] [PreciousStones] shipp07 placed a Air of Atlantis field [LAPIS_ORE|860 72 -4,463]
2012-01-07 02:41:28 [SEVERE] Could not pass event BLOCK_BREAK to PreciousStones
java.lang.NullPointerException
at net.sacredlabyrinth.Phaed.PreciousStones.managers.ForceFieldManager.deleteField(ForceFieldManager.java:333)
at net.sacredlabyrinth.Phaed.PreciousStones.managers.ForceFieldManager.release(ForceFieldManager.java:2023)
at net.sacredlabyrinth.Phaed.PreciousStones.listeners.PSBlockListener.onBlockBreak(PSBlockListener.java:296)
at org.bukkit.plugin.java.JavaPluginLoader$40.execute(JavaPluginLoader.java:539)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:339)
at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:201)
at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:81)
at net.minecraft.server.EntityPlayer.w_(EntityPlayer.java:134)
at net.minecraft.server.World.entityJoinedWorld(World.java:1253)
at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:107)
at net.minecraft.server.World.playerJoinedWorld(World.java:1235)
at net.minecraft.server.World.tickEntities(World.java:1142)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:518)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
2012-01-07 02:41:41 [INFO] No orphans found