mi minecraft crashed: 
Minecraft has crashed!
----------------------
Minecraft has stopped running because it encountered a problem; Failed to start game
A full error report has been saved to /Users/imac/Library/Application Support/minecraft/crash-reports/crash-2012-12-24_11.37.09-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash 
--- BEGIN ERROR REPORT 69f65f0f --------
Full report at:
/Users/imac/Library/Application Support/minecraft/crash-reports/crash-2012-12-24_11.37.09-client.txt
Please show that file to Mojang, NOT just this screen!
Generated 24/12/12 11:37
-- System Details --
Details:
Minecraft Version: 1.4.6
Operating System: Mac OS X (x86_64) version 10.6.8
Java Version: 1.6.0_33, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 458689048 bytes (437 MB) / 532545536 bytes (507 MB) up to 532545536 bytes (507 MB)
JVM Flags: 2 total; -Xms512m -Xmx512m
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 v7.25 FML v4.6.12.511 Minecraft Forge 6.5.0.471 13 mods loaded, 13 mods active
mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
Forestry [Forestry for Minecraft] (forestry-A-1.6.4.1.jar) Unloaded->Constructed->Pre-initialized->Errored
mod_TooManyItems [mod_TooManyItems] (TooManyItems2012_12_22_1.4.6.zip) Unloaded->Constructed->Pre-initialized->Initialized
IC2 [IndustrialCraft 2] (industrialcraft-2_1.112.170-lf.jar) Unloaded->Constructed->Pre-initialized->Initialized
LogisticsPipes|Main [Logistics Pipes] (LogisticsPipes-MC1.4.6-0.6.9.33.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Core [BuildCraft] (BuildCraft-Mod-1.4.6.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Builders [BC Builders] (BuildCraft-Mod-1.4.6.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Energy [BC Energy] (BuildCraft-Mod-1.4.6.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Factory [BC Factory] (BuildCraft-Mod-1.4.6.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Transport [BC Transport] (BuildCraft-Mod-1.4.6.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Silicon [BC Silicon] (BuildCraft-Mod-1.4.6.jar) Unloaded->Constructed->Pre-initialized->Initialized
LWJGL: 2.4.2
OpenGL: NVIDIA GeForce 9400 OpenGL Engine GL version 2.1 NVIDIA-1.6.36, NVIDIA Corporation
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
java.lang.IllegalArgumentException: Slot 4095 is already occupied by ic2.core.block.BlockTex@2994363b when adding forestry.core.gadgets.BlockSoil@6fd2300e
at amq.<init>(Block.java:324)
at forestry.core.gadgets.BlockSoil.<init>(BlockSoil.java:35)
at forestry.core.config.ConfigureBlocks.initialize(ConfigureBlocks.java:18)
at forestry.core.config.Config.load(Config.java:205)
at forestry.core.ForestryCore.init(ForestryCore.java:60)
at forestry.core.ForestryClient.init(ForestryClient.java:32)
at forestry.Forestry.init(Forestry.java:47)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:478)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:140)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:83)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:656)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:207)
at net.minecraft.client.Minecraft.a(Minecraft.java:456)
at asq.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(Minecraft.java:744)
at java.lang.Thread.run(Thread.java:680)
--- END ERROR REPORT 7b186e83 ----------