Sorry, I wasn't sure if that would be "hijacking" the thread. Here is my log. This is with two mods, although they did not work individually, either.
2013-05-04 17:11:53 [iNFO] [ForgeModLoader] Forge Mod Loader version 5.2.2.684 for Minecraft 1.5.2 loading
2013-05-04 17:11:53 [iNFO] [ForgeModLoader] Java is Java HotSpot Client VM, version 1.7.0_17, running on Windows 7:x86:6.1, installed at C:\Program Files\Java\jre7
2013-05-04 17:11:53 [FINE] [ForgeModLoader] Java classpath at launch is C:\Users\David\Desktop\Minecraft.exe
2013-05-04 17:11:53 [FINE] [ForgeModLoader] Java library path at launch is C:\Program Files\Java\jre7\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Windows\system32;C:\Windows;C:\Windows\system32\wbem;C:\Program Files\NVIDIA Corporation\PhysX\Common;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Windows\System32\WindowsPowerShell\v1.0;C:\Program Files\QuickTime\QTSystem;C:\Program Files\Windows Live\Shared;C:\Program Files\Java\jre7\bin;.
2013-05-04 17:11:53 [FINE] [ForgeModLoader] Enabling runtime deobfuscation
2013-05-04 17:11:53 [FINEST] [ForgeModLoader] All core mods are successfully located
2013-05-04 17:11:53 [FINEST] [ForgeModLoader] Discovering coremods
2013-05-04 17:11:53 [FINEST] [ForgeModLoader] Found library file argo-small-3.2.jar present and correct in lib dir
2013-05-04 17:11:53 [FINEST] [ForgeModLoader] Found library file guava-14.0-rc3.jar present and correct in lib dir
2013-05-04 17:11:53 [FINEST] [ForgeModLoader] Found library file asm-all-4.1.jar present and correct in lib dir
2013-05-04 17:11:53 [FINEST] [ForgeModLoader] Found library file bcprov-jdk15on-148.jar present and correct in lib dir
2013-05-04 17:11:53 [FINEST] [ForgeModLoader] Found library file deobfuscation_data_1.5.2.zip present and correct in lib dir
2013-05-04 17:11:53 [FINEST] [ForgeModLoader] Found library file scala-library.jar present and correct in lib dir
2013-05-04 17:11:53 [FINEST] [ForgeModLoader] Running coremod plugins
2013-05-04 17:11:53 [FINEST] [ForgeModLoader] Running coremod plugin FMLCorePlugin
2013-05-04 17:11:54 [sEVERE] [ForgeModLoader] FML appears to be missing any signature data. This is not a good thing
2013-05-04 17:11:54 [FINEST] [ForgeModLoader] Coremod plugin FMLCorePlugin run successfully
2013-05-04 17:11:54 [FINEST] [ForgeModLoader] Running coremod plugin FMLForgePlugin
2013-05-04 17:11:54 [FINEST] [ForgeModLoader] Coremod plugin FMLForgePlugin run successfully
2013-05-04 17:11:54 [FINEST] [ForgeModLoader] Validating minecraft
2013-05-04 17:11:54 [FINEST] [ForgeModLoader] Minecraft validated, launching...
2013-05-04 17:11:55 [iNFO] [sTDOUT] 229 recipes
2013-05-04 17:11:55 [iNFO] [sTDOUT] 27 achievements
2013-05-04 17:11:56 [iNFO] [Minecraft-Client] Setting user: Verdian
2013-05-04 17:11:56 [iNFO] [sTDOUT] (Session ID is 2529053927017626934)
2013-05-04 17:11:56 [iNFO] [Minecraft-Client] LWJGL Version: 2.4.2
2013-05-04 17:11:56 [iNFO] [MinecraftForge] Attempting early MinecraftForge initialization
2013-05-04 17:11:56 [iNFO] [sTDOUT] MinecraftForge v7.8.0.684 Initialized
2013-05-04 17:11:56 [iNFO] [ForgeModLoader] MinecraftForge v7.8.0.684 Initialized
2013-05-04 17:11:57 [iNFO] [sTDOUT] Replaced 85 ore recipies
2013-05-04 17:11:57 [iNFO] [MinecraftForge] Completed early MinecraftForge initialization
2013-05-04 17:11:57 [iNFO] [ForgeModLoader] Reading custom logging properties from C:\Users\David\AppData\Roaming\.minecraft\config\logging.properties
2013-05-04 17:11:57 [OFF] [ForgeModLoader] Logging level for ForgeModLoader logging is set to ALL
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Building injected Mod Containers [cpw.mods.fml.common.FMLDummyContainer, net.minecraftforge.common.ForgeDummyContainer]
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Attempting to load mods contained in the minecraft jar file and associated classes
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Skipping known library file C:\Users\David\AppData\Roaming\.minecraft\bin\lwjgl.jar
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Skipping known library file C:\Users\David\AppData\Roaming\.minecraft\bin\jinput.jar
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Skipping known library file C:\Users\David\AppData\Roaming\.minecraft\bin\lwjgl_util.jar
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Found a minecraft related file at C:\Users\David\AppData\Roaming\.minecraft\bin\minecraft.jar, examining for mod candidates
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Skipping known library file C:\Users\David\AppData\Roaming\.minecraft\lib\argo-small-3.2.jar
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Skipping known library file C:\Users\David\AppData\Roaming\.minecraft\lib\guava-14.0-rc3.jar
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Skipping known library file C:\Users\David\AppData\Roaming\.minecraft\lib\asm-all-4.1.jar
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Skipping known library file C:\Users\David\AppData\Roaming\.minecraft\lib\bcprov-jdk15on-148.jar
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Skipping known library file C:\Users\David\AppData\Roaming\.minecraft\lib\deobfuscation_data_1.5.2.zip
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Skipping known library file C:\Users\David\AppData\Roaming\.minecraft\lib\scala-library.jar
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Minecraft jar mods loaded successfully
2013-05-04 17:11:57 [iNFO] [ForgeModLoader] Searching C:\Users\David\AppData\Roaming\.minecraft\mods for mods
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Found a candidate zip or jar file ExtrabiomesXL-universal-1.5.1-3.13.0.jar
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Found a candidate zip or jar file mca v3.3.1.zip
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Examining file minecraft.jar for potential mods
2013-05-04 17:11:57 [FINE] [ForgeModLoader] The mod container minecraft.jar appears to be missing an mcmod.info file
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Examining file ExtrabiomesXL-universal-1.5.1-3.13.0.jar for potential mods
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Located mcmod.info file in file ExtrabiomesXL-universal-1.5.1-3.13.0.jar
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Identified an FMLMod type mod extrabiomes.Extrabiomes
2013-05-04 17:11:57 [FINEST] [ExtrabiomesXL] Parsed dependency info : [] [] []
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Examining file mca v3.3.1.zip for potential mods
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Located mcmod.info file in file mca v3.3.1.zip
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Identified an FMLMod type mod mods.MCA.MCA
2013-05-04 17:11:57 [FINEST] [MCA] Parsed dependency info : [] [] []
2013-05-04 17:11:57 [iNFO] [ForgeModLoader] Forge Mod Loader has identified 5 mods to load
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Received a system property request ''
2013-05-04 17:11:57 [FINER] [ForgeModLoader] System property request managing the state of 0 mods
2013-05-04 17:11:57 [FINE] [ForgeModLoader] After merging, found state information for 0 mods
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Reloading logging properties from C:\Users\David\AppData\Roaming\.minecraft\config\logging.properties
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Reloaded logging properties
2013-05-04 17:11:57 [FINE] [mcp] Mod Logging channel mcp configured at default level.
2013-05-04 17:11:57 [iNFO] [mcp] Activating mod mcp
2013-05-04 17:11:57 [FINE] [FML] Mod Logging channel FML configured at default level.
2013-05-04 17:11:57 [iNFO] [FML] Activating mod FML
2013-05-04 17:11:57 [FINE] [Forge] Mod Logging channel Forge configured at default level.
2013-05-04 17:11:57 [iNFO] [Forge] Activating mod Forge
2013-05-04 17:11:57 [FINE] [ExtrabiomesXL] Enabling mod ExtrabiomesXL
2013-05-04 17:11:57 [FINE] [ExtrabiomesXL] Mod Logging channel ExtrabiomesXL configured at default level.
2013-05-04 17:11:57 [iNFO] [ExtrabiomesXL] Activating mod ExtrabiomesXL
2013-05-04 17:11:57 [FINE] [MCA] Enabling mod MCA
2013-05-04 17:11:57 [FINE] [MCA] Mod Logging channel MCA configured at default level.
2013-05-04 17:11:57 [iNFO] [MCA] Activating mod MCA
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Verifying mod requirements are satisfied
2013-05-04 17:11:57 [FINER] [ForgeModLoader] All mod requirements are satisfied
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Sorting mods into an ordered list
2013-05-04 17:11:57 [FINER] [ForgeModLoader] Mod sorting completed successfully
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Mod sorting data
2013-05-04 17:11:57 [FINE] [ForgeModLoader] ExtrabiomesXL(ExtrabiomesXL:3.13.0): ExtrabiomesXL-universal-1.5.1-3.13.0.jar ()
2013-05-04 17:11:57 [FINE] [ForgeModLoader] MCA(Minecraft Comes Alive:3.3.1): mca v3.3.1.zip ()
2013-05-04 17:11:57 [FINEST] [mcp] Sending event FMLConstructionEvent to mod mcp
2013-05-04 17:11:57 [FINEST] [mcp] Sent event FMLConstructionEvent to mod mcp
2013-05-04 17:11:57 [FINEST] [FML] Sending event FMLConstructionEvent to mod FML
2013-05-04 17:11:57 [FINEST] [FML] Sent event FMLConstructionEvent to mod FML
2013-05-04 17:11:57 [FINEST] [Forge] Sending event FMLConstructionEvent to mod Forge
2013-05-04 17:11:57 [FINEST] [Forge] Sent event FMLConstructionEvent to mod Forge
2013-05-04 17:11:57 [FINEST] [ExtrabiomesXL] Sending event FMLConstructionEvent to mod ExtrabiomesXL
2013-05-04 17:11:57 [FINEST] [ForgeModLoader] Testing mod ExtrabiomesXL to verify it accepts its own version in a remote connection
2013-05-04 17:11:57 [FINEST] [ForgeModLoader] The mod ExtrabiomesXL accepts its own version (3.13.0)
2013-05-04 17:11:57 [FINE] [ForgeModLoader] Attempting to inject @SidedProxy classes into ExtrabiomesXL
2013-05-04 17:11:57 [iNFO] [sTDERR] Exception in thread "Minecraft main thread" java.lang.VerifyError: (class: extrabiomes/proxy/ClientProxy, method: registerScarecrowRendering signature: ()V) Incompatible argument to function
2013-05-04 17:11:57 [iNFO] [sTDERR] at java.lang.Class.forName0(Native Method)
2013-05-04 17:11:57 [iNFO] [sTDERR] at java.lang.Class.forName(Unknown Source)
2013-05-04 17:11:57 [iNFO] [sTDERR] at cpw.mods.fml.common.ProxyInjector.inject(ProxyInjector.java:50)
2013-05-04 17:11:57 [iNFO] [sTDERR] at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:471)
2013-05-04 17:11:57 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2013-05-04 17:11:57 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2013-05-04 17:11:57 [iNFO] [sTDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2013-05-04 17:11:57 [iNFO] [sTDERR] at java.lang.reflect.Method.invoke(Unknown Source)
2013-05-04 17:11:57 [iNFO] [sTDERR] at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
2013-05-04 17:11:57 [iNFO] [sTDERR] at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
2013-05-04 17:11:57 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
2013-05-04 17:11:57 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
2013-05-04 17:11:57 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.post(EventBus.java:267)
2013-05-04 17:11:57 [iNFO] [sTDERR] at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:165)
2013-05-04 17:11:57 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2013-05-04 17:11:57 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2013-05-04 17:11:57 [iNFO] [sTDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2013-05-04 17:11:57 [iNFO] [sTDERR] at java.lang.reflect.Method.invoke(Unknown Source)
2013-05-04 17:11:57 [iNFO] [sTDERR] at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
2013-05-04 17:11:57 [iNFO] [sTDERR] at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
2013-05-04 17:11:57 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
2013-05-04 17:11:57 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
2013-05-04 17:11:57 [iNFO] [sTDERR] at com.google.common.eventbus.EventBus.post(EventBus.java:267)
2013-05-04 17:11:57 [iNFO] [sTDERR] at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:98)
2013-05-04 17:11:57 [iNFO] [sTDERR] at cpw.mods.fml.common.Loader.loadMods(Loader.java:503)
2013-05-04 17:11:57 [iNFO] [sTDERR] at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:160)
2013-05-04 17:11:57 [iNFO] [sTDERR] at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:410)
2013-05-04 17:11:57 [iNFO] [sTDERR] at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)
2013-05-04 17:11:57 [iNFO] [sTDERR] at net.minecraft.client.Minecraft.run(Minecraft.java:732)
2013-05-04 17:11:57 [iNFO] [sTDERR] at java.lang.Thread.run(Unknown Source)
What does "problem with custom npcs" mean? Maybe we have the same problem.