Voilà depuis hier j'installe quelques petits mods par-ci par là juste histoire d'augmenter un peu l'expérience du jeu 
Et je n'avais eu aucun problème !
J'ai installé:
Forge
Additional Pipes
AdvancedMachines
Buildcraft
Enderstorage
ExtrabiomeXL
Industrial Craft 2
Mais voulant installer le mod Factorization, après l'interface Mojang il y a une erreur que voici:
---- Minecraft Crash Report ----
// I just don't know what went wrong 
Time: 07/03/13 11:32
Description: Failed to start game
java.lang.ArrayIndexOutOfBoundsException: 4241
at amq.<init>(Block.java:324)
at akb.<init>(BlockContainer.java:11)
at factorization.common.BlockFactorization.<init>(Blo
ckFactorization.java:27)
at factorization.common.Registry.makeBlocks(Registry.
java:102)
at factorization.common.Core.load(Core.java:207)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ
e
Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow
n
Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un
known
Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.handleModState
Event(FMLModContainer.java:487)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknow
n
Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un
known
Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEven
t(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandle
r.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(Event
Bus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueued
Events(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.
java:268)
at cpw.mods.fml.common.LoadController.propogateStateM
essage(LoadController.java:153)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ
e
Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow
n
Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un
known
Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEven
t(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandle
r.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(Event
Bus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueued
Events(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.
java:268)
at cpw.mods.fml.common.LoadController.distributeState
Message(LoadController.java:86)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:50
5)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraf
tLoading(FMLClientHandler.java:161)
at net.minecraft.client.Minecraft.a(Minecraft.java:41
2)
at asq.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(Minecraft.java:
746)
at java.lang.Thread.run(Unknown Source)
A detailed walkthrough of the error, its code path and all known details is as follows:
--------------------------------------------------
-------------------------------------
-- System Details --
Details:
Minecraft Version: 1.4.7
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_11, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 352614960 bytes (336 MB) / 648740864 bytes (618 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v7.26a FML v4.7.35.556 Minecraft Forge 6.6.2.534 16 mods loaded, 16 mods active
mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized
FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized
Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized
CodeChickenCore [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized
BuildCraft|Core [BuildCraft] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized
BuildCraft|Factory [BC Factory] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized
BuildCraft|Transport [BC Transport] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized
BuildCraft|Silicon [BC Silicon] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized
APUnofficial [Additional Pipes] (AdditionalPipes2.1.3u42-BC3.4.2-MC1.4.7.jar) Unloaded->Constructed->Pre-initialized
IC2 [IndustrialCraft 2] (industrialcraft-2_1.112.170-lf.jar) Unloaded->Constructed->Pre-initialized
AdvancedMachines [IC2 Advanced Machines Addon] (AdvancedMachines_1.4.6.zip) Unloaded->Constructed->Pre-initialized
BuildCraft|Builders [BC Builders] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized
BuildCraft|Energy [BC Energy] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized
EnderStorage [EnderStorage] (EnderStorage 1.4.1.2.jar) Unloaded->Constructed->Pre-initialized
ExtrabiomesXL [ExtrabiomesXL] (ExtrabiomesXL-universal-1.4.7-3.10.0.jar) Unloaded->Constructed->Pre-initialized
factorization [Factorization] (Factorization-0.7.10.jar) Unloaded->Constructed->Errored
LWJGL: 2.4.2
OpenGL: Intel(R) HD Graphics Family GL version 3.1.0 - Build 8.15.10.2372, Intel
Is Modded: Definitely; Client brand changed to 'forge,fml'
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
Un peu d'aide ? 
