Bukkit

What steps will reproduce the problem?
1. Load server - plugin loads fine
2. (mobs start spawning?) Severe errors occur

What is the expected output? What do you see instead?
No error. Errors

What version of the product are you using?
v1.90.0

Do you have an error log of what happened?
2013-08-07 08:33:56 [SEVERE] [NoLagg] Unhandled exception occured in onPacketSending(PacketEvent) for NoLagg
java.lang.NoSuchMethodError: com.bergerkiller.bukkit.common.controller.EntityNetworkController.getProtocolPositionSynched()Lcom/bergerkiller/bukkit/common/bases/IntVector3;
    at com.bergerkiller.bukkit.nolagg.patches.NLPPacketListener.onPacketSend(NLPPacketListener.java:76)
    at com.bergerkiller.bukkit.common.internal.network.ProtocolLibPacketHandler$CommonPacketListener.onPacketSending(ProtocolLibPacketHandler.java:240)
    at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketSending(SortedPacketListenerList.java:113)
    at com.comphenix.protocol.injector.PacketFilterManager.handlePacket(PacketFilterManager.java:544)
    at com.comphenix.protocol.injector.PacketFilterManager.invokePacketSending(PacketFilterManager.java:519)
    at com.comphenix.protocol.injector.player.PlayerInjector.handlePacketSending(PlayerInjector.java:606)
    at com.comphenix.protocol.injector.player.NetworkServerInjector$1.intercept(NetworkServerInjector.java:158)
    at net.minecraft.server.v1_6_R2.PlayerConnection$$EnhancerByCGLIB$$150945c.sendPacket(<generated>)
    at net.minecraft.server.v1_6_R2.EntityTrackerEntry.updatePlayer(EntityTrackerEntry.java:320)
    at net.minecraft.server.v1_6_R2.EntityTracker.a(EntityTracker.java:204)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.bergerkiller.bukkit.common.reflection.SafeMethod.invoke(SafeMethod.java:130)
    at com.bergerkiller.bukkit.common.reflection.classes.EntityTrackerRef.spawnEntities(EntityTrackerRef.java:33)
    at com.bergerkiller.bukkit.common.wrappers.EntityTracker.spawnEntities(EntityTracker.java:46)
    at com.bergerkiller.bukkit.nolagg.chunks.ChunkSendCommand.send(ChunkSendCommand.java:40)
    at com.bergerkiller.bukkit.nolagg.chunks.ChunkCompressQueue.sendNext(ChunkCompressQueue.java:166)
    at com.bergerkiller.bukkit.nolagg.chunks.ChunkSendQueue.sendBatch(ChunkSendQueue.java:383)
    at com.bergerkiller.bukkit.nolagg.chunks.ChunkSendQueue.update(ChunkSendQueue.java:319)
    at com.bergerkiller.bukkit.nolagg.chunks.ChunkSendQueue.update(ChunkSendQueue.java:297)
    at com.bergerkiller.bukkit.nolagg.chunks.ChunkSendQueue.access$2(ChunkSendQueue.java:228)
    at com.bergerkiller.bukkit.nolagg.chunks.ChunkSendQueue$ChunkSendingTask.run(ChunkSendQueue.java:58)
    at org.bukkit.craftbukkit.v1_6_R2.scheduler.CraftTask.run(CraftTask.java:53)
    at org.bukkit.craftbukkit.v1_6_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345)
    at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:522)
    at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:226)
    at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:486)
    at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:419)
    at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
2013-08-07 08:33:56 [SEVERE] Parameters:
  net.minecraft.server.v1_6_R2.Packet24MobSpawn@519d68e1[
    a=101
    b=51
    c=650338
    d=768
    e=-1135
    f=0
    g=-627
    h=0
    i=-67
    j=0
    k=-63
    t=net.minecraft.server.v1_6_R2.DataWatcher@2b080bdb
    u=<null>
    m=<null>
    timestamp=1375889636538
    lowPriority=false
    packetID=24
  ]

^ that happens a ton (probably per mob spawn)

Please provide any additional information below.
I have these plugins installed:
[GroupManager] Loading GroupManager v2.0 (2.10.1) (Phoenix)
[WorldEdit] Loading WorldEdit v5.5.7
[MythicDrops] Loading MythicDrops v1.1.2-SNAPSHOT-b264
[LoreAttributes] Loading LoreAttributes v1.2.1
[ConsoleScheduler] Loading ConsoleScheduler v1.0
[Quests] Loading Quests v1.6.4
[Vault] Loading Vault v1.2.25-b333
[Multiverse-Core] Loading Multiverse-Core v2.5-b641
[HealthBar] Loading HealthBar v1.6.1.2
[NCore] Loading NCore v0.3.2
[PlayerHeads] Loading PlayerHeads v3.2-jenkins-PlayerHeads-1-11-gb37e970
[Questioner] Loading Questioner v0.6
[UberForest] Loading UberForest v2.2.0
[WorldGuard] Loading WorldGuard v5.8
[NoSpawners] Loading NoSpawners v0.1
[AutoMessage] Loading AutoMessage v2.3.5
[NTheEndAgain] Loading NTheEndAgain v0.3.2
[CraftBay] Loading CraftBay v1.2.6
[Permissions] Loading Permissions v3.1.6
[OpSmokeTrail] Loading OpSmokeTrail v1.1
[OpenInv] Loading OpenInv v2.0.6
[Lockette] Loading Lockette v1.7.12
[ClearLag] Loading ClearLag v2.4.1
[ProtocolLib] Loading ProtocolLib v2.6.0
[Votifier] Loading Votifier v1.9
[mcMMO] Loading mcMMO v1.4.06-b2121
[MailBox] Loading MailBox v2.7
[Essentials] Loading Essentials v2.11.1
[Citizens] Loading Citizens v2.0.9-SNAPSHOT (build 943)
[CreeperHeal] Loading CreeperHeal v6.6.1
[EssentialsProtect] Loading EssentialsProtect v2.11.1
[Towny] Loading Towny v0.84.0.0
[OtherDrops] Loading OtherDrops v2.8b.573
[EssentialsSpawn] Loading EssentialsSpawn v2.11.1
[Multiverse-Portals] Loading Multiverse-Portals v2.5-b692
[Multiverse-Inventories] Loading Multiverse-Inventories v2.5-b351
[Enjin Minecraft Plugin] Loading Enjin Minecraft Plugin v2.4.9
[EssentialsAntiBuild] Loading EssentialsAntiBuild v2.11.1
[DisguiseCraft] Loading DisguiseCraft v4.9
[Sentry] Loading Sentry v1.5
[CompatNoCheatPlus] Loading CompatNoCheatPlus v6.4.4-RC-sMD5NET-b61
[CraftBook] Loading CraftBook v2501-4fb5b2d
[BKCommonLib] Loading BKCommonLib v1.54
[ShowCaseStandalone] Loading ShowCaseStandalone v0
[TownyChat] Loading TownyChat v0.4
[NoCheatPlus] Loading NoCheatPlus v3.10.1-beta-sMD5NET-b601
[NoLagg] Loading NoLagg v1.90.0