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here's the crash report

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 06/07/13 20:01
Description: Failed to start game

cpw.mods.fml.common.LoaderException: java.lang.NoSuchFieldError: customCraftingMaterial
at cpw.mods.fml.common.LoadController.transition(LoadController.java:147)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:692)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:213)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:448)
at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)
at net.minecraft.client.Minecraft.run(Minecraft.java:733)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoSuchFieldError: customCraftingMaterial
at palaria.common.Palaria.load(Palaria.java:1803)
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 cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:494)
at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:192)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:172)
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.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:103)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:691)
... 5 more


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

-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Windows 8 (x86) version 6.2
Java Version: 1.7.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 378475536 bytes (360 MB) / 518979584 bytes (494 MB) up to 518979584 bytes (494 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 v7.51 FML v5.2.23.737 Minecraft Forge 7.8.1.737 Optifine OptiFine_1.5.2_HD_D5 20 mods loaded, 20 mods active
mcp{7.51} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
FML{5.2.23.737} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
Forge{7.8.1.737} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
CodeChickenCore{0.8.7.3} [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
NotEnoughItems{1.5.2.28} [Not Enough Items] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
mod_bspkrsCore{v2.09(1.5.2)} [bspkrsCore] ([1.5.2]bspkrsCorev2.09.zip) Unloaded->Constructed->Pre-initialized->Initialized
Palaria_Palariamod{2.6.0 Beta} [Palaria] (Palaria Mod v2.6.0 beta.jar) Unloaded->Constructed->Pre-initialized->Errored
FlansMod{2.4} [Flan's Mod] (Flans Mod 2.3.2 for Minecraft 1.5.2 Universal.zip) Unloaded->Constructed->Pre-initialized->Initialized
AnimatedPlayer{1.2.0} [Animated Player Mod] (Animated Player v1.2.0 mc1.5.2 (1).zip) Unloaded->Constructed->Pre-initialized->Initialized
InstaHouse{[1.5.2] Insta House v 3.6} [Insta House] (Insta House v 3.6.zip) Unloaded->Constructed->Pre-initialized->Initialized
mod_thx{Minecraft THX Helicopter Mod - mod_thx-v023-mc_151} [mod_thx] (mod_thx_helicopter_mc152_v024.zip) Unloaded->Constructed->Pre-initialized->Initialized
Backpack{1.12.13} [Backpack] (backpack-1.12.13-1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
weaponmod{1.5.2 v1.12.0} [Balkon's WeaponMod] (Balkons-Weapon-Mod-1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
MutantCreatures{1.3.4} [Mutant Creatures] (Mutant Creatures v1.3.4 mc1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
mod_Gibs{1.5.2v1} [mod_Gibs] (MobDismemberment1.5.2v1.zip) Unloaded->Constructed->Pre-initialized->Initialized
mod_ReiMinimap{v3.3_06 [1.5.2]} [mod_ReiMinimap] ([1.5.2]ReiMinimap_v3.3_06.zip) Unloaded->Constructed->Pre-initialized->Initialized
mod_MinecraftPlus{v1.42 - MC 1.5.2} [mod_MinecraftPlus] (BetterCraft_v2.0_1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
TwilightForest{1.18.1} [The Twilight Forest] (twilightforest-1.18.1.zip) Unloaded->Constructed->Pre-initialized->Initialized
DamageIndicatorsMod{2.7.0.1} [Damage Indicators] (1.5.2 DamageIndicators v2.7.0.1.zip) Unloaded->Constructed->Pre-initialized-