All I know is, that forestry crashes with mekanism. I disabled all features of forestry, but the backpacks. only reason, i added it.
it fixed something, but not all. ideas?

---- Minecraft Crash Report ----
// Why did you do that?

Description: Initializing game

java.lang.NoClassDefFoundError: mekanism/common/tile/TileEntityChanceMachine
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at cpw.mods.fml.common.ProxyInjector.inject(ProxyInjector.java:59)
at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:492)
at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:208)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:187)
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.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:492)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:204)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:480)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:867)
at net.minecraft.client.main.Main.main(SourceFile:148)
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 net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: mekanism.common.tile.TileEntityChanceMachine
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 35 more
Caused by: java.lang.NoClassDefFoundError: mekanism/common/tile/TileEntityBasicMachine
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
... 37 more
Caused by: java.lang.ClassNotFoundException: mekanism.common.tile.TileEntityBasicMachine
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:101)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 41 more

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

-- Head --
Stacktrace:
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at cpw.mods.fml.common.ProxyInjector.inject(ProxyInjector.java:59)
at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:492)
at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:208)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:187)
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.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:492)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:204)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:480)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:867)
at net.minecraft.client.main.Main.main(SourceFile:148)
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 net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_71, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 589912880 bytes (562 MB) / 965738496 bytes (921 MB) up to 1908932608 bytes (1820 MB)
JVM Flags: 3 total; -Xms256M -Xmx2048M -XX:PermSize=256m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.05 FML v7.10.85.1263 Minecraft Forge 10.13.2.1263 132 mods loaded, 132 mods active
mcp{9.05} Minecraft Coder Pack Unloaded->Constructed
FML{7.10.85.1263} Forge Mod Loader Unloaded->Constructed
Forge{10.13.2.1263} Minecraft Forge Unloaded->Constructed
appliedenergistics2-core{rv2-alpha-26} AppliedEnergistics2 Core Unloaded->Constructed
Aroma1997Core{1.0.2.13} Aroma1997Core Unloaded->Constructed
CodeChickenCore{1.0.4.29} CodeChicken Core Unloaded->Constructed
{000} CoFH ASM Data Initialization Unloaded->Constructed
Micdoodlecore{} Micdoodle8 Core Unloaded->Constructed
MobiusCore{1.2.3} MobiusCore Unloaded->Constructed
NotEnoughItems{1.0.3.67} Not Enough Items Unloaded->Constructed
ThaumicTinkerer-preloader{0.1} Thaumic Tinkerer Core Unloaded->Constructed
OpenModsCore{0.6} OpenModsCore Unloaded->Constructed
lotr{Beta v18.2 for Minecraft 1.7.10} [The Lord of the Rings Mod]([1.7.10] The Lord of the Rings Mod Public Beta 18.2.jar) Unloaded->Constructed
appliedenergistics2{rv2-alpha-26} Applied Energistics 2 Unloaded->Constructed
ArchimedesShips{1.7.10 v1.7.1} Archimedes' Ships Unloaded->Constructed
Aroma1997CoreHelper{1.0.2.13} Aroma1997Core|Helper Unloaded->Constructed
ATG{0.10.0} Alternate Terrain Generation Unloaded->Constructed
bdlib{1.5.1.32} BD Lib Unloaded->Constructed
BetterTitleScreen{1.7.10-1.1} Better Title Screen Unloaded->Constructed
BiblioCraft{1.9.1} BiblioCraft Unloaded->Constructed
BiomesOPlenty{2.1.0} Biomes O' Plenty Unloaded->Constructed
BiblioWoodsBoP{1.9} BiblioWoods Biomes O'Plenty Edition Unloaded->Constructed
CoFHCore{1.7.10R3.0.0B8} CoFH Core Unloaded->Constructed
Forestry{3.3.0.6} Forestry for Minecraft Unloaded->Constructed
BiblioWoodsForestry{1.7} BiblioWoods Forestry Edition Unloaded->Constructed
ThermalFoundation{1.7.10R1.0.0B3} Thermal Foundation Unloaded->Constructed
ThermalExpansion{1.7.10R4.0.0B6} Thermal Expansion Unloaded->Constructed
BigReactors{0.4.1A2} Big Reactors Unloaded->Constructed
AWWayofTime{v1.3.0b} Blood Magic: Alchemical Wizardry Unloaded->Constructed
bluepower{0.1.766} Blue Power Unloaded->Constructed
Baubles{1.0.1.10} Baubles Unloaded->Constructed
Thaumcraft{4.2.1.4} Thaumcraft Unloaded->Constructed
Botania{r1.3-152} [Botania](Botania r1.3-152.jar) Unloaded->Constructed
CarpentersBlocks{3.3.3} [Carpenter's Blocks](Carpenter's Blocks v3.3.3 - MC 1.7.10.jar) Unloaded->Constructed
ChickenChunks{1.3.4.14} ChickenChunks Unloaded->Constructed
chisel{1.5.7} Chisel Unloaded->Constructed
DynamicLights{1.3.7} Dynamic Lights Unloaded->Constructed
DynamicLights_onFire{1.0.4} Dynamic Lights Burning Entity Module Unloaded->Constructed
DynamicLights_creepers{1.0.4} Dynamic Lights Creeper Module Unloaded->Constructed
DynamicLights_dropItems{1.0.7} Dynamic Lights EntityItem Module Unloaded->Constructed
DynamicLights_entityClasses{1.0.1} Dynamic Lights Entity Light Module Unloaded->Constructed
DynamicLights_mobEquipment{1.0.7} Dynamic Lights Mob Equipment Light Module Unloaded->Constructed
DynamicLights_flameArrows{1.0.0} Dynamic Lights Fiery Arrows Light Module Unloaded->Constructed
DynamicLights_floodLights{1.0.1} Dynamic Lights Flood Light Unloaded->Constructed
DynamicLights_otherPlayers{1.0.7} Dynamic Lights OtherPlayers Light Module Unloaded->Constructed
DynamicLights_thePlayer{1.1.3} Dynamic Lights Player Light Module Unloaded->Constructed
Enchiridion{1.1} Enchiridion Unloaded->Constructed
EnderStorage{1.4.5.25} EnderStorage Unloaded->Constructed
Waila{1.5.5} Waila Unloaded->Constructed
extracells{2.2.40} ExtraCells Unloaded->Constructed
Mantle{1.7.10-0.3.2.jenkins184} Mantle Unloaded->Constructed
MineFactoryReloaded{1.7.10R2.8.0RC5} MineFactory Reloaded Unloaded->Constructed
TConstruct{1.7.10-1.8.2.build858} Tinkers' Construct Unloaded->Constructed
ExtraTiC{0.8.4} ExtraTiC Unloaded->Constructed
ForgeMultipart{1.1.0.314} Forge Multipart Unloaded->Constructed
ExtraUtilities{1.2.0} Extra Utilities Unloaded->Constructed
fognerf{1.7.10-0.3} Fog Nerf Unloaded->Constructed
GalacticraftCore{3.0.7} Galacticraft Core Unloaded->Constructed
GalacticraftMars{3.0.7} Galacticraft Planets Unloaded->Constructed
GraveStone{2.11.3} GraveStone Unloaded->Constructed
InfernalMobs{1.5.9} Infernal Mobs Unloaded->Constructed
inpure|core{1.7.10R1.0.0B7} INpureCore Unloaded->Constructed
inventorytweaks{1.59-dev-152-cf6e263} Inventory Tweaks Unloaded->Constructed
IronChest{6.0.62.742} Iron Chest Unloaded->Constructed
JABBA{1.1.4} JABBA Unloaded->Constructed
journeymap{5.0.1} JourneyMap Unloaded->Constructed
Railcraft{9.4.0.0} Railcraft Unloaded->Constructed
RedstoneArsenal{1.7.10R1.1.0RC1} Redstone Arsenal Unloaded->Constructed
Mekanism{7.1.0} Mekanism Unloaded
MekanismGenerators{7.1.0} MekanismGenerators Unloaded
MekanismTools{7.1.0} MekanismTools Unloaded
MineFactoryReloaded|CompatAppliedEnergistics{1.7.10R2.8.0RC5} MFR Compat: Applied Energistics Unloaded
MineFactoryReloaded|CompatAtum{1.7.10R2.8.0RC4} MFR Compat: Atum Unloaded
MineFactoryReloaded|CompatBackTools{1.7.10R2.8.0RC5} MFR Compat: BackTools Unloaded
MineFactoryReloaded|CompatBuildCraft{1.7.10R2.8.0RC4} MFR Compat: BuildCraft Unloaded
MineFactoryReloaded|CompatChococraft{1.7.10R2.8.0RC4} MFR Compat: Chococraft Unloaded
MineFactoryReloaded|CompatExtraBiomes{1.7.10R2.8.0RC4} MFR Compat: ExtraBiomes Unloaded
MineFactoryReloaded|CompatForestry{1.7.10R2.8.0RC5} MFR Compat: Forestry Unloaded
MineFactoryReloaded|CompatForgeMicroblock{1.7.10R2.8.0RC4} MFR Compat: ForgeMicroblock Unloaded
MineFactoryReloaded|CompatIC2{1.7.10R2.8.0RC4} MFR Compat: IC2 Unloaded
MineFactoryReloaded|CompatMystcraft{1.7.10R2.8.0RC4} MFR Compat: Mystcraft Unloaded
MrTJPCoreMod{1.0} MrTJPCoreMod Unloaded
ProjRed|Core{4.5.8.59} ProjectRed Unloaded
ProjRed|Exploration{4.5.8.59} ProjectRed-Exploration Unloaded
MineFactoryReloaded|CompatProjRed{1.7.10R2.8.0RC4} MFR Compat ProjectRed Unloaded
MineFactoryReloaded|CompatRailcraft{1.7.10R2.8.0RC4} MFR Compat: Railcraft Unloaded
MineFactoryReloaded|CompatRP2{1.7.10R2.8.0RC4} MFR Compat: RP2 Unloaded
MineFactoryReloaded|CompatSufficientBiomes{1.7.10R2.8.0RC4} MFR Compat: Sufficient Biomes Unloaded
MineFactoryReloaded|CompatThaumcraft{1.7.10R2.8.0RC5} MFR Compat: Thaumcraft Unloaded
MineFactoryReloaded|CompatThermalExpansion{1.7.10R2.8.0RC4} MFR Compat: Thermal Expansion Unloaded
TwilightForest{2.3.2} The Twilight Forest Unloaded
MineFactoryReloaded|CompatTwilightForest{1.7.10R2.8.0RC5} MFR Compat: TwilightForest Unloaded
MineFactoryReloaded|CompatVanilla{1.7.10R2.8.0RC5} MFR Compat: Vanilla Unloaded
NEIAddons{1.12.2.9} NEI Addons Unloaded
NEIAddons|Botany{1.12.2.9} NEI Addons: Botany Unloaded
NEIAddons|Forestry{1.12.2.9} NEI Addons: Forestry Unloaded
NEIAddons|CraftingTables{1.12.2.9} NEI Addons: Crafting Tables Unloaded
NEIAddons|ExNihilo{1.12.2.9} NEI Addons: Ex Nihilo Unloaded
neiintegration{1.0.1} NEI Integration Unloaded
notenoughkeys{@MOD_VERSION@} NotEnoughKEys Unloaded
ObsidiPlates{3.0.0.18} ObsidiPlates Unloaded
OpenMods{0.6} OpenMods Unloaded
OpenBlocks{1.3} OpenBlocks Unloaded
MapWriter{2.1.1} MapWriter Unloaded
Opis{1.2.3} Opis Unloaded
ProjRed|Transmission{4.5.8.59} ProjectRed-Transmission Unloaded
ProjRed|Transportation{4.5.8.59} ProjectRed-Transportation Unloaded
ProjRed|Compatibility{4.5.8.59} ProjectRed-Compatibility Unloaded
ProjRed|Integration{4.5.8.59} ProjectRed-Integration Unloaded
ProjRed|Illumination{4.5.8.59} ProjectRed-Illumination Unloaded
ProjRed|Expansion{4.5.8.59} ProjectRed-Expansion Unloaded
libsandstone{1.0.0} libsandstone Unloaded
xreliquary{1.2} Reliquary Unloaded
secretroomsmod{4.7.1} The SecretRoomsMod Unloaded
SpecialMobs{3.0.3} Special Mobs Unloaded
ThaumicTinkerer{unspecified} Thaumic Tinkerer Unloaded
erebus{0.2pre11c} Erebus Unloaded
TiCTooltips{1.2.1} TiC Tooltips Unloaded
TMechworks{1.7.10-86.e500b88} Tinkers' Mechworks Unloaded
torchLevers{1.4.1} Torch Levers Unloaded
Translocator{1.1.1.13} Translocator Unloaded
WailaHarvestability{1.1.0} Waila Harvestability Unloaded
wawla{1.0.9} What Are We Looking At Unloaded
weaponmod{v1.14.3} Balkon's WeaponMod Unloaded
witchery{0.22.0} Witchery Unloaded
WR-CBE|Core{1.4.1.9} WR-CBE Core Unloaded
WR-CBE|Addons{1.4.1.9} WR-CBE Addons Unloaded
WR-CBE|Logic{1.4.1.9} WR-CBE Logic Unloaded
McMultipart{1.1.0.314} Minecraft Multipart Plugin Unloaded
aobd{2.3.6} Another One Bites The Dust Unloaded
IguanaTweaksTConstruct{1.7.10-2.1.2.101} Iguana Tinker Tweaks Unloaded
ForgeMicroblock{1.1.0.314} Forge Microblocks Unloaded
OpenModsLib crash transformers: [gl_capabilities_hook:FINISHED],[player_render_hook:FINISHED],[map_gen_fix:ENABLED],[movement_callback:FINISHED],[stencil_patches:FINISHED]
AE2 Version: alpha rv2-alpha-26 for Forge 10.13.2.1230
Mantle Environment: Environment healthy.
TConstruct Environment: Environment healthy.
Launched Version: 1.7.10
LWJGL: 2.9.1
OpenGL: GeForce GTS 450/PCIe/SSE2 GL version 4.4.0 NVIDIA 344.75, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: [JSTR.zip]
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)

Try installing the IC2 API http://ic2api.player.to:8080/job/IC2_experimental/

Thank you, for the quick response.
Though your idea didn't changed a thing.

@Dinmagol I think this was one of those weird bugs fixed ~20 versions ago, nobody even remembers they existed. Mind updating? You're still on build 92.

Ah yes, IC2 issue