When i go into survival mode, after having just inventory tweaks, and Too many items installed the game crashes. here is my report

---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 7/9/13 12:11 PM
Description: Unexpected error

java.lang.IllegalAccessError: tried to access field net.minecraft.client.gui.inventory.GuiContainer.field_74198_m from class invtweaks.InvTweaksObfuscation
at invtweaks.InvTweaksObfuscation.getGuiX(InvTweaksObfuscation.java:160)
at invtweaks.InvTweaks.handleGUILayout(InvTweaks.java:760)
at invtweaks.InvTweaks.onTickInGUI(InvTweaks.java:139)
at invtweaks.forge.ForgeClientTick.tickEnd(ForgeClientTick.java:43)
at cpw.mods.fml.common.SingleIntervalHandler.tickEnd(SingleIntervalHandler.java:34)
at cpw.mods.fml.common.FMLCommonHandler.tickEnd(FMLCommonHandler.java:141)
at cpw.mods.fml.common.FMLCommonHandler.onPostClientTick(FMLCommonHandler.java:367)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1956)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:898)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:826)
at net.minecraft.client.main.Main.main(SourceFile:101)
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 net.minecraft.launchwrapper.Launch.launch(Launch.java:57)
at net.minecraft.launchwrapper.Launch.main(Launch.java:18)

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

-- Head --
Stacktrace:
at invtweaks.InvTweaksObfuscation.getGuiX(InvTweaksObfuscation.java:160)
at invtweaks.InvTweaks.handleGUILayout(InvTweaks.java:760)
at invtweaks.InvTweaks.onTickInGUI(InvTweaks.java:139)
at invtweaks.forge.ForgeClientTick.tickEnd(ForgeClientTick.java:43)
at cpw.mods.fml.common.SingleIntervalHandler.tickEnd(SingleIntervalHandler.java:34)
at cpw.mods.fml.common.FMLCommonHandler.tickEnd(FMLCommonHandler.java:141)
at cpw.mods.fml.common.FMLCommonHandler.onPostClientTick(FMLCommonHandler.java:367)

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityClientPlayerMP['trddd'/54, l='MpServer', x=47.39, y=97.12, z=45.08]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-2,94,-341), Chunk: (at 14,5,11 in -1,-22; contains blocks -16,0,-352 to -1,255,-337), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Level time: 1919184 game time, 1545021 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: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 31 total; [EntityPainting['Painting'/68, l='MpServer', x=78.50, y=76.00, z=17.06], EntityPainting['Painting'/69, l='MpServer', x=87.94, y=76.00, z=52.00], EntityPainting['Painting'/70, l='MpServer', x=87.94, y=83.00, z=51.00], EntityPainting['Painting'/70, l='MpServer', x=87.94, y=83.00, z=51.00], EntityPainting['Painting'/71, l='MpServer', x=109.06, y=83.00, z=46.00], EntityPainting['Painting'/64, l='MpServer', x=43.50, y=83.00, z=53.94], EntityPainting['Painting'/67, l='MpServer', x=67.50, y=76.00, z=17.06], EntityPainting['Painting'/76, l='MpServer', x=109.06, y=76.00, z=71.00], EntityPainting['Painting'/77, l='MpServer', x=109.06, y=76.00, z=69.00], EntityPig['Pig'/78, l='MpServer', x=125.39, y=77.00, z=23.50], EntityPainting['Painting'/71, l='MpServer', x=109.06, y=83.00, z=46.00], EntityPainting['Painting'/72, l='MpServer', x=109.06, y=83.00, z=43.00], EntityPainting['Painting'/73, l='MpServer', x=109.06, y=83.00, z=40.00], EntityPainting['Painting'/74, l='MpServer', x=109.06, y=83.00, z=51.00], EntityPainting['Painting'/75, l='MpServer', x=109.06, y=83.00, z=48.50], EntityPainting['Painting'/67, l='MpServer', x=67.50, y=76.00, z=17.06], EntityPainting['Painting'/64, l='MpServer', x=43.50, y=83.00, z=53.94], EntityPainting['Painting'/69, l='MpServer', x=87.94, y=76.00, z=52.00], EntityPainting['Painting'/68, l='MpServer', x=78.50, y=76.00, z=17.06], EntityPainting['Painting'/72, l='MpServer', x=109.06, y=83.00, z=43.00], EntityPainting['Painting'/73, l='MpServer', x=109.06, y=83.00, z=40.00], EntityPig['Pig'/59, l='MpServer', x=3.03, y=90.00, z=101.97], EntityPainting['Painting'/74, l='MpServer', x=109.06, y=83.00, z=51.00], EntitySheep['Sheep'/58, l='MpServer', x=0.25, y=81.00, z=40.22], EntityPainting['Painting'/75, l='MpServer', x=109.06, y=83.00, z=48.50], EntityClientPlayerMP['trddd'/54, l='MpServer', x=47.39, y=97.12, z=45.08], EntityPainting['Painting'/76, l='MpServer', x=109.06, y=76.00, z=71.00], EntityPainting['Painting'/77, l='MpServer', x=109.06, y=76.00, z=69.00], EntityCow['Cow'/63, l='MpServer', x=32.31, y=74.00, z=29.22], EntityCow['Cow'/61, l='MpServer', x=30.78, y=85.00, z=101.22], EntitySheep['Sheep'/60, l='MpServer', x=17.94, y=87.00, z=96.16]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:440)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2298)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:851)
at net.minecraft.client.main.Main.main(SourceFile:101)
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 net.minecraft.launchwrapper.Launch.launch(Launch.java:57)
at net.minecraft.launchwrapper.Launch.main(Launch.java:18)

-- System Details --
Details:
Minecraft Version: 1.6.2
Operating System: Mac OS X (x86_64) version 10.8.4
Java Version: 1.6.0_51, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 36090864 bytes (34 MB) / 232611840 bytes (221 MB) up to 1568538624 bytes (1495 MB)
JVM Flags: 1 total; -Xmx1500m
AABB Pool Size: 363 (20328 bytes; 0 MB) allocated, 153 (8568 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
FML: MCP v8.04 FML v6.2.16.784 Minecraft Forge 9.10.0.784 5 mods loaded, 5 mods active
mcp{8.04} Minecraft Coder Pack Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{6.2.16.784} Forge Mod Loader Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{9.10.0.784} Minecraft Forge Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
TooManyItems{1.6.2} TooManyItems Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
inventorytweaks{1.55} Inventory Tweaks Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Launched Version: 1.6.2-Forge9.10.0.784
LWJGL: 2.9.0
OpenGL: NVIDIA GeForce 320M OpenGL Engine GL version 2.1 NVIDIA-8.12.47 310.40.00.05f01, NVIDIA Corporation
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Pack: oCd pack 1
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 327 (18312 bytes; 0 MB) allocated, 26 (1456 bytes; 0 MB) used

What is going on? is it the fact tmi adds the option to add items that you cannot get normally?

So basically there is no way that this can be fixed until TMI can stop wholesale replacing classes?

Go tell the TMI guy to stop wholesale replacing classes, or at least to make everything in them public if he is.