Starting up my server causes a trainwreck

Okay, so I'm starting up my server again after a while, got everything updated and whatnot. The world itself is fine, but whenever I put my plugins & lib folders in the server is unable to start.

Here's the error log:

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03:28:08 [INFO] Starting minecraft server version 1.1
03:28:08 [INFO] Loading properties
03:28:08 [INFO] Starting Minecraft server on *:25565
03:28:08 [INFO] This server is running CraftBukkit version git-Bukkit-1.1-R6-b19
88jnks (MC: 1.1) (Implementing API version 1.1-R6)
03:28:08 [SEVERE] java.lang.NullPointerException: null value
03:28:08 [SEVERE] at com.google.common.base.Preconditions.checkNotNull(Pre
conditions.java:204)
03:28:08 [SEVERE] at com.google.common.collect.ImmutableMap.entryOf(Immuta
bleMap.java:139)
03:28:08 [SEVERE] at com.google.common.collect.ImmutableMap$Builder.put(Im
mutableMap.java:178)
03:28:08 [SEVERE] at org.bukkit.plugin.PluginDescriptionFile.loadMap(Plugi
nDescriptionFile.java:214)
03:28:08 [SEVERE] at org.bukkit.plugin.PluginDescriptionFile.<init>(Plugin
DescriptionFile.java:40)
03:28:08 [SEVERE] at org.bukkit.plugin.java.JavaPluginLoader.getPluginDesc
ription(JavaPluginLoader.java:198)
03:28:08 [SEVERE] at org.bukkit.plugin.SimplePluginManager.loadPlugins(Sim
plePluginManager.java:132)
03:28:08 [SEVERE] at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftS
erver.java:206)
03:28:08 [SEVERE] at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer
.java:182)
03:28:08 [SEVERE] at net.minecraft.server.ServerConfigurationManager.<init
>(ServerConfigurationManager.java:53)
03:28:08 [SEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:147)
03:28:08 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:407)
03:28:08 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:465)
03:28:08 [SEVERE] Unexpected exception
java.lang.NullPointerException: null value
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:
204)
at com.google.common.collect.ImmutableMap.entryOf(ImmutableMap.java:139)

at com.google.common.collect.ImmutableMap$Builder.put(ImmutableMap.java:
178)
at org.bukkit.plugin.PluginDescriptionFile.loadMap(PluginDescriptionFile
.java:214)
at org.bukkit.plugin.PluginDescriptionFile.<init>(PluginDescriptionFile.
java:40)
at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPlug
inLoader.java:198)
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:132)
at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:206)
at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer.java:182)
at net.minecraft.server.ServerConfigurationManager.<init>(ServerConfigur
ationManager.java:53)
at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:147)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:407)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
>

And my plugins:

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AutoCraft
ChairCraft
ChatManager
Essentials
EssentialsChat
EssentialsProtect
EssentialsSpawn
Herochat
iConomy
Lockette
MapClone
McMMO
MobDisguise
Modifyworld
PermissionsEx
SafeEdit
WorldEdit
WorldGuard
xAuth

I have gson, h2, mysql, and postgresql in my lib folders.

*EDIT* Alright now, for some reason when I put a plugin in there PERIOD it fails to load.

 

That version of the bukkit-server is totaly fucked up =P

Download the latest dev. build, it works great

http://dl.bukkit.org/downloads/craftbukkit/

 

That works much better, thanks