http://pastebin.com/JBup3r1M

Forestry 3.6.3.20 release 14th July, latest from Curse is the one i'm using with ModTweaker2 - 0.9.1 current latest from Curse. Tried removing Binnies mods in case that was the cause but it's definately between Forestry and Mod tweaker.

This is computronics, not us.

Seems like the mod Computronics is not compatible with newest forestry version. It's not a ModTweaker2 bug. The bug is already known and fixed in the computronics git. Please update the mod.

Ref: Vexatos/Computronics#127

Caused by: java.lang.NoSuchMethodError: forestry.apiculture.genetics.AlleleFlowers.<init>(Ljava/lang/String;Lforestry/api/genetics/IFlowerProvider;Z)V
    at pl.asie.computronics.integration.forestry.IntegrationForestry.initOC(IntegrationForestry.java:60)