IC2 seems to have a problem with some of my mods, but theoretically it should work fine - all of the mods are included in Tekkit modpack, so there should not be any problems.
The crash report:
Code
Mods loaded: 23
ModLoader 1.2.5
mod_CodeChickenCore 0.5.2
mod_ReiMinimap v3.0_06 [1.2.5]
mod_BuildCraftCore 3.1.5
mod_BuildCraftBuilders 3.1.5
mod_BuildCraftEnergy 3.1.5
mod_BuildCraftFactory 3.1.5
mod_BuildCraftTransport 3.1.5
mod_BuildCraftSilicon 3.1.5
mod_Forestry 1.4.4.4
mod_BuildCraftZFP (Forestry Package)
mod_IC2 v1.95
mod_InvTweaks 1.41b (1.2.4)
mod_LightSensor 1.2.5
mod_MinecraftForge 3.1.2.94
mod_NotEnoughItems 1.2.2
mod_RedPowerControl 2.0pr5b1
mod_RedPowerCore 2.0pr5b1
mod_RedPowerLighting 2.0pr5b1
mod_RedPowerLogic 2.0pr5b1
mod_RedPowerMachine 2.0pr5b1
mod_RedPowerWiring 2.0pr5b1
mod_RedPowerWorld 2.0pr5b1
Minecraft has crashed!
----------------------
Minecraft has stopped running because it encountered a problem.
--- BEGIN ERROR REPORT 9fd81ea9 --------
Generated 01.05.12 13:28
Minecraft: Minecraft 1.2.5
OS: Windows 7 (x86) version 6.1
Java: 1.7.0_04, Oracle Corporation
VM: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
LWJGL: 2.4.2
OpenGL: GeForce GTX 260/PCIe/SSE2 version 3.3.0, NVIDIA Corporation
java.lang.NoSuchMethodError: ic2.common.ItemIC2.setNoRepair()Lyr;
at ic2.common.ItemIC2.<init>(ItemIC2.java:28)
at ic2.common.ItemResin.<init>(ItemResin.java:24)
at mod_IC2.load(mod_IC2.java:226)
at ModLoader.init(ModLoader.java:891)
at ModLoader.addAllRenderers(ModLoader.java:189)
at ahu.<init>(ahu.java:77)
at ahu.<clinit>(ahu.java:8)
at net.minecraft.client.Minecraft.a(SourceFile:273)
at net.minecraft.client.Minecraft.run(SourceFile:657)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT c3bcd41c ----------