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Minecraft has crashed!
----------------------
Minecraft has stopped running because it encountered a problem; Unexpected error
A full error report has been saved to C:\Users\dragon_2398\AppData\Roaming\.minecraft\crash-reports\crash-2013-05-12_11.31.02-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 b280e7b7 --------
Full report at:
C:\Users\dragon_2398\AppData\Roaming\.minecraft\crash-reports\crash-2013-05-12_11.31.02-client.txt
Please show that file to Mojang, NOT just this screen!
Generated 5/12/13 11:31 AM
-- Head --
Stacktrace:
at ItemRecipeBook.func_77659_a(ItemRecipeBook.java:18)
at net.minecraft.item.ItemStack.func_77957_a(ItemStack.java:173)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78769_a(PlayerControllerMP.java:423)
at net.minecraft.client.Minecraft.func_71402_c(Minecraft.java:1343)
-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityClientPlayerMP['dragon_2398'/103, l='MpServer', x=207.76, y=64.62, z=-169.40]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-200,64,252), Chunk: (at 8,4,12 in -13,15; contains blocks -208,0,240 to -193,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 164856 game time, 181620 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: 108 total; [EntityMinecartChest['entity.MinecartChest.name'/275, l='MpServer', x=244.50, y=27.50, z=-173.50], EntityMinecartChest['entity.MinecartChest.name'/278, l='MpServer', x=248.53, y=32.34, z=-132.47], EntityCow['Cow'/276, l='MpServer', x=246.25, y=72.00, z=-161.47], EntityMinecartChest['entity.MinecartChest.name'/283, l='MpServer', x=256.50, y=26.50, z=-177.50], EntityMinecartChest['entity.MinecartChest.name'/284, l='MpServer', x=269.50, y=19.34, z=-186.50], EntityMinecartChest['entity.MinecartChest.name'/256, l='MpServer', x=235.50, y=28.50, z=-153.50], EntityCreeper['Creeper'/38726, l='MpServer', x=200.00, y=64.00, z=-158.53], EntityMinecartChest['entity.MinecartChest.name'/267, l='MpServer', x=248.50, y=20.50, z=-232.50], EntityMinecartChest['entity.MinecartChest.name'/270, l='MpServer', x=250.50, y=27.50, z=-198.50], EntitySpider['Spider'/74566, l='MpServer', x=198.72, y=63.00, z=-157.03], EntityEnderman['Enderman'/212623, l='MpServer', x=245.50, y=20.00, z=-207.50], EntitySkeleton['Skeleton'/222603, l='MpServer', x=268.50, y=67.00, z=-206.50], EntityCow['Cow'/288, l='MpServer', x=262.88, y=64.00, z=-168.91], EntityCow['Cow'/289, l='MpServer', x=262.69, y=70.00, z=-162.59], EntityCow['Cow'/290, l='MpServer', x=269.63, y=66.00, z=-174.41], EntityCow['Cow'/291, l='MpServer', x=261.47, y=75.00, z=-161.47], EntityCow['Cow'/292, l='MpServer', x=262.66, y=74.00, z=-161.81], EntityCow['Cow'/293, l='MpServer', x=264.38, y=83.00, z=-152.59], EntityMinecartChest['entity.MinecartChest.name'/294, l='MpServer', x=258.50, y=19.50, z=-132.50], EntitySlime['Slime'/94673, l='MpServer', x=154.31, y=18.00, z=-217.69], EntityMinecartChest['entity.MinecartChest.name'/302, l='MpServer', x=277.50, y=27.50, z=-207.50], EntityBat['Bat'/223271, l='MpServer', x=243.41, y=26.81, z=-193.78], EntityBat['Bat'/223265, l='MpServer', x=225.15, y=58.88, z=-121.62], EntitySkeleton['Skeleton'/59658, l='MpServer', x=228.69, y=63.01, z=-163.50], EntityZombie['Zombie'/223181, l='MpServer', x=259.50, y=22.00, z=-117.50], EntityBat['Bat'/223275, l='MpServer', x=250.54, y=28.33, z=-195.86], EntityBat['Bat'/223273, l='MpServer', x=245.75, y=27.00, z=-193.25], EntitySpider['Spider'/223177, l='MpServer', x=206.19, y=63.00, z=-119.22], EntitySpider['Spider'/223188, l='MpServer', x=209.81, y=86.00, z=-232.38], EntitySkeleton['Skeleton'/223187, l='MpServer', x=281.50, y=69.00, z=-102.50], EntityItem['item.item.bone'/217283, l='MpServer', x=155.13, y=17.13, z=-202.36], EntityCreeper['Creeper'/218527, l='MpServer', x=289.44, y=23.00, z=-201.03], EntityBat['Bat'/219725, l='MpServer', x=250.25, y=21.10, z=-229.88], EntityCreeper['Creeper'/217573, l='MpServer', x=219.50, y=23.00, z=-172.50], EntityMinecartChest['entity.MinecartChest.name'/104, l='MpServer', x=216.50, y=20.50, z=-174.50], EntityZombie['Zombie'/218755, l='MpServer', x=160.34, y=33.00, z=-164.00], EntityCreeper['Creeper'/197217, l='MpServer', x=154.50, y=39.00, z=-168.50], EntityBat['Bat'/221864, l='MpServer', x=252.26, y=17.77, z=-125.72], EntityBat['Bat'/219729, l='MpServer', x=233.64, y=21.09, z=-236.44], EntityBat['Bat'/219737, l='MpServer', x=282.49, y=15.27, z=-110.42], EntitySpider['Spider'/222747, l='MpServer', x=213.72, y=68.95, z=-199.09], EntityPig['Pig'/141, l='MpServer', x=142.88, y=68.00, z=-192.06], EntityPig['Pig'/143, l='MpServer', x=140.84, y=72.00, z=-196.72], EntityCow['Cow'/142, l='MpServer', x=141.78, y=73.00, z=-198.53], EntityClientPlayerMP['dragon_2398'/103, l='MpServer', x=207.76, y=64.62, z=-169.40], EntityZombie['Zombie'/220362, l='MpServer', x=286.50, y=16.00, z=-132.50], EntityZombie['Zombie'/222740, l='MpServer', x=268.50, y=17.00, z=-128.50], EntitySpider['Spider'/220367, l='MpServer', x=284.72, y=16.00, z=-137.97], EntityZombie['Zombie'/222742, l='MpServer', x=266.50, y=17.00, z=-130.50], EntityPig['Pig'/152, l='MpServer', x=144.03, y=68.00, z=-192.44], EntityPig['Pig'/153, l='MpServer', x=150.22, y=71.00, z=-166.50], EntityCreeper['Creeper'/220374, l='MpServer', x=166.50, y=29.00, z=-162.50], EntityZombie['Zombie'/219828, l='MpServer', x=233.50, y=19.00, z=-194.50], EntityCow['Cow'/149, l='MpServer', x=145.28, y=73.00, z=-242.50], EntityCreeper['Creeper'/219830, l='MpServer', x=234.50, y=19.00, z=-193.50], EntityCow['Cow'/150, l='MpServer', x=150.47, y=73.00, z=-244.25], EntityZombie['Zombie'/217370, l='MpServer', x=135.50, y=15.00, z=-118.50], EntityCow['Cow'/151, l='MpServer', x=151.63, y=74.00, z=-236.56], EntityPig['Pig'/171, l='MpServer', x=164.41, y=65.00, z=-127.81], EntityPig['Pig'/170, l='MpServer', x=172.47, y=64.00, z=-119.34], EntityPig['Pig'/169, l='MpServer', x=168.75, y=66.00, z=-125.16], EntityPig['Pig'/168, l='MpServer', x=167.97, y=68.00, z=-160.94], EntitySheep['Sheep'/174, l='MpServer', x=171.50, y=64.00, z=-95.50], EntityPig['Pig'/173, l='MpServer', x=174.50, y=63.00, z=-108.50], EntityPig['Pig'/172, l='MpServer', x=163.38, y=64.00, z=-117.22], EntityPig['Pig'/166, l='MpServer', x=173.50, y=70.00, z=-180.81], EntityCow['Cow'/165, l='MpServer', x=166.03, y=70.00, z=-206.19], EntityPig['Pig'/164, l='MpServer', x=160.53, y=72.00, z=-198.69], EntityCreeper['Creeper'/219325, l='MpServer', x=135.50, y=52.00, z=-242.50], EntityCreeper['Creeper'/218219, l='MpServer', x=236.50, y=32.00, z=-219.50], EntityPig['Pig'/190, l='MpServer', x=180.53, y=63.00, z=-98.16], EntityZombie['Zombie'/219322, l='MpServer', x=286.50, y=25.00, z=-168.50], EntityPig['Pig'/189, l='MpServer', x=168.19, y=64.00, z=-106.41], EntityEnderman['Enderman'/222759, l='MpServer', x=211.71, y=69.00, z=-142.34], EntityPig['Pig'/182, l='MpServer', x=180.13, y=73.00, z=-213.03], EntityMinecartChest['entity.MinecartChest.name'/180, l='MpServer', x=183.50, y=23.50, z=-215.50], EntityMinecartChest['entity.MinecartChest.name'/181, l='MpServer', x=189.50, y=28.50, z=-218.50], EntityCow['Cow'/205, l='MpServer', x=196.50, y=97.00, z=-156.81], EntityCow['Cow'/204, l='MpServer', x=195.06, y=97.00, z=-157.75], EntityCow['Cow'/206, l='MpServer', x=194.06, y=97.00, z=-158.94], EntityCow['Cow'/203, l='MpServer', x=194.16, y=101.00, z=-165.03], EntityCow['Cow'/202, l='MpServer', x=197.91, y=98.00, z=-161.16], EntityCreeper['Creeper'/221112, l='MpServer', x=152.50, y=14.00, z=-228.50], EntityZombie['Zombie'/221118, l='MpServer', x=231.50, y=27.00, z=-119.50], EntitySkeleton['Skeleton'/221116, l='MpServer', x=229.88, y=28.00, z=-120.50], EntityCreeper['Creeper'/222584, l='MpServer', x=136.50, y=57.00, z=-217.50], EntityCreeper['Creeper'/222585, l='MpServer', x=134.50, y=57.00, z=-217.50], EntityMinecartChest['entity.MinecartChest.name'/221, l='MpServer', x=209.50, y=28.50, z=-195.50], EntityBat['Bat'/219358, l='MpServer', x=152.63, y=28.28, z=-199.31], EntityCreeper['Creeper'/222583, l='MpServer', x=136.50, y=57.00, z=-218.50], EntityCow['Cow'/227, l='MpServer', x=221.49, y=81.00, z=-159.58], EntityCreeper['Creeper'/225, l='MpServer', x=216.50, y=36.00, z=-157.50], EntityCow['Cow'/224, l='MpServer', x=211.41, y=81.00, z=-181.75], EntitySquid['Squid'/223100, l='MpServer', x=269.06, y=56.19, z=-125.66], EntityCreeper['Creeper'/221731, l='MpServer', x=265.50, y=44.00, z=-110.50], EntityMinecartChest['entity.MinecartChest.name'/254, l='MpServer', x=225.50, y=22.50, z=-167.50], EntitySquid['Squid'/223101, l='MpServer', x=262.50, y=58.38, z=-128.50], EntityCow['Cow'/255, l='MpServer', x=228.53, y=65.00, z=-164.53], EntitySquid['Squid'/223102, l='MpServer', x=262.50, y=58.22, z=-125.63], EntityCreeper['Creeper'/221729, l='MpServer', x=263.50, y=44.00, z=-109.50], EntitySquid['Squid'/223103, l='MpServer', x=266.88, y=55.34, z=-125.84], EntityCreeper['Creeper'/221728, l='MpServer', x=264.50, y=44.00, z=-111.50], EntityEnderman['Enderman'/221735, l='MpServer', x=172.41, y=24.00, z=-113.50], EntitySpider['Spider'/221733, l='MpServer', x=174.28, y=24.00, z=-114.75], EntityBat['Bat'/218626, l='MpServer', x=177.70, y=48.00, z=-227.70], EntityMinecartChest['entity.MinecartChest.name'/246, l='MpServer', x=228.50, y=20.50, z=-244.50], EntityEnderman['Enderman'/221737, l='MpServer', x=173.69, y=24.00, z=-116.19], EntityEnderman['Enderman'/221736, l='MpServer', x=172.88, y=24.00, z=-114.72]]
Retry entities: 0 total; []
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:441)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2414)
at net.minecraft.client.Minecraft.run(Minecraft.java:783)
at java.lang.Thread.run(Unknown Source)
-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Windows 8 (amd64) version 6.2
Java Version: 1.7.0_10, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 171313712 bytes (163 MB) / 533921792 bytes (509 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 4179 (234024 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 20, allocated: 1, tallocated: 63
FML: MCP v7.51 FML v5.2.5.691 Minecraft Forge 7.8.0.691 Optifine OptiFine_1.5.2_HD_D2 7 mods loaded, 7 mods active
mcp{7.44} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{5.2.5.691} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{7.8.0.691} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_TooManyItems{1.5.2 2013-04-25} [mod_TooManyItems] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_RecipeBook{1.5.2} [mod_RecipeBook] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
CustomNpcs{0.8} [CustomNpcs] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Backpack{1.8.11} [Backpack] (backpack-1.8.11-1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
LWJGL: 2.4.2
OpenGL: Intel(R) HD Graphics GL version 3.1.0 - Build 9.17.10.2828, Intel
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Texture Pack: Sphax PureBDcraft 32x MC15.zip
Profiler Position: N/A (disabled)
Vec3 Pool Size: 1474 (82544 bytes; 0 MB) allocated, 16 (896 bytes; 0 MB) used
java.lang.NoClassDefFoundError: InventoryRecipeBook
at ItemRecipeBook.func_77659_a(ItemRecipeBook.java:18)
at net.minecraft.item.ItemStack.func_77957_a(ItemStack.java:173)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78769_a(PlayerControllerMP.java:423)
at net.minecraft.client.Minecraft.func_71402_c(Minecraft.java:1343)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1800)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:835)
at net.minecraft.client.Minecraft.run(Minecraft.java:760)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: InventoryRecipeBook
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:238)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 8 more
Caused by: java.lang.ClassFormatError: Duplicate method name&signature in class file InventoryRecipeBook
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:227)
... 10 more
--- END ERROR REPORT 750e53e8 ----------

This is my friends Client (dragon_2398) anyway He has the following mods installed:
1. Minecraftforge
2. Too many items
3. Optifine
4. CustomNpc's
5. Recipe book
This error occurs when he goes to open the recipe book but as long as he doesn't open it the client is working. Please Help!