New Error

---- Minecraft Crash Report ----
// Ouch. That hurt :(

Time: 11/23/14 6:43 PM
Description: Ticking screen

java.lang.ClassCastException: mekanism.common.entity.EntityBalloon cannot be cast to net.minecraft.entity.EntityLivingBase
	at net.minecraft.client.multiplayer.NetClientHandler.func_72519_a(NetClientHandler.java:955)
	at net.minecraft.network.packet.Packet24MobSpawn.func_73279_a(SourceFile:87)
	at net.minecraft.network.TcpConnection.func_74428_b(TcpConnection.java:462)
	at net.minecraft.client.multiplayer.NetClientHandler.func_72551_d(NetClientHandler.java:281)
	at net.minecraft.client.multiplayer.GuiConnecting.func_73876_c(GuiConnecting.java:51)
	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1580)
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:910)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:838)
	at net.minecraft.client.main.Main.main(SourceFile:101)
	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 net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:27)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at net.minecraft.client.multiplayer.NetClientHandler.func_72519_a(NetClientHandler.java:955)
	at net.minecraft.network.packet.Packet24MobSpawn.func_73279_a(SourceFile:87)
	at net.minecraft.network.TcpConnection.func_74428_b(TcpConnection.java:462)
	at net.minecraft.client.multiplayer.NetClientHandler.func_72551_d(NetClientHandler.java:281)
	at net.minecraft.client.multiplayer.GuiConnecting.func_73876_c(GuiConnecting.java:51)

-- Affected screen --
Details:
	Screen name: ~~ERROR~~ NullPointerException: null

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [GCCorePlayerSP['Vrijdog_180'/7625, l='MpServer', x=-142.23, y=87.32, z=341.82]]
	Chunk stats: MultiplayerChunkCache: 35
	Level seed: 0
	Level generator: ID 04 - BIOMESOP, ver 0. Features enabled: false
	Level generator options:
	Level spawn location: World: (-176,64,256), Chunk: (at 0,4,0 in -11,16; contains blocks -176,0,256 to -161,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 27299 game time, 27299 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 39 total; [EntityTFNagaSegment['unknown'/205, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/204, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/207, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/206, l='MpServer', x=0.00, y=0.00, z=0.00], EntitySquid['Squid'/7587, l='MpServer', x=-129.34, y=59.88, z=361.31], EntityTFNagaSegment['unknown'/201, l='MpServer', x=0.00, y=0.00, z=0.00], EntitySquid['Squid'/7588, l='MpServer', x=-131.66, y=60.03, z=362.31], EntityTFNagaSegment['unknown'/200, l='MpServer', x=0.00, y=0.00, z=0.00], EntitySquid['Squid'/7589, l='MpServer', x=-126.63, y=61.03, z=354.59], EntityZombie['Zombie'/7528, l='MpServer', x=-143.50, y=33.00, z=359.50], EntityTFNagaSegment['unknown'/203, l='MpServer', x=0.00, y=0.00, z=0.00], EntitySquid['Squid'/7590, l='MpServer', x=-123.66, y=59.72, z=359.63], EntityTFNagaSegment['unknown'/202, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/197, l='MpServer', x=0.00, y=0.00, z=0.00], EntityManaCreeper['Mana Creeper'/7524, l='MpServer', x=-147.50, y=33.00, z=357.50], EntitySquid['Squid'/7594, l='MpServer', x=-187.78, y=60.91, z=352.56], EntityZombie['Zombie'/7527, l='MpServer', x=-146.50, y=33.00, z=356.50], EntityTFNagaSegment['unknown'/199, l='MpServer', x=0.00, y=0.00, z=0.00], EntityZombie['Zombie'/7526, l='MpServer', x=-146.50, y=33.00, z=354.50], EntityTFNagaSegment['unknown'/198, l='MpServer', x=0.00, y=0.00, z=0.00], EntitySquid['Squid'/7548, l='MpServer', x=-165.31, y=54.94, z=357.69], EntitySquid['Squid'/7549, l='MpServer', x=-164.44, y=54.84, z=353.53], EntityCreeper['Creeper'/7481, l='MpServer', x=-139.50, y=32.75, z=371.50], EntityCreeper['Creeper'/7482, l='MpServer', x=-137.50, y=33.00, z=365.50], EntityCreeper['Creeper'/7483, l='MpServer', x=-148.50, y=33.00, z=365.47], EntityCreeper['Creeper'/7484, l='MpServer', x=-139.16, y=33.00, z=367.66], EntitySquid['Squid'/7547, l='MpServer', x=-165.19, y=55.63, z=363.63], EntityTFNagaSegment['unknown'/208, l='MpServer', x=0.00, y=0.00, z=0.00], EntitySquid['Squid'/7559, l='MpServer', x=-108.72, y=54.81, z=352.03], EntitySquid['Squid'/7630, l='MpServer', x=-173.53, y=47.34, z=401.63], EntitySquid['Squid'/7631, l='MpServer', x=-171.50, y=47.28, z=404.31], EntitySquid['Squid'/7560, l='MpServer', x=-107.41, y=56.25, z=352.22], EntityItem['item.tile.bop.stoneFormations.stalagmite'/7628, l='MpServer', x=-96.84, y=36.13, z=394.34], EntitySpider['Spider'/7492, l='MpServer', x=-151.50, y=27.00, z=380.50], EntityItem['item.tile.bop.stoneFormations.stalactite'/7629, l='MpServer', x=-88.94, y=31.13, z=391.28], EntitySquid['Squid'/7626, l='MpServer', x=-168.78, y=47.03, z=399.78], EntityMinecartChest['entity.MinecartChest.name'/166, l='MpServer', x=-173.50, y=24.50, z=329.50], EntitySquid['Squid'/7627, l='MpServer', x=-174.81, y=49.25, z=396.91], GCCorePlayerSP['Vrijdog_180'/7625, l='MpServer', x=-142.23, y=87.32, z=341.82]]
	Retry entities: 0 total; []