I just noticed this - for some reason the Still does not use exact numbers.
An example:
mods.forestry.Still.addRecipe(100, liquid:juice * 10, liquid:bioethanol * 2);
"* 10" will use 1000mB of Fruit Juice, "* 2" will output 200mB of Ethanol.
I know this is Forestry's behaviour but could you make it so that it accepts more precise values?

Fixed, does it happen with any other machines?

Not that I noticed, lol. I will test Thermionic Fabricator and Centrifuge once you give me the compiled version 😉

Doesn't seem to work. Mhm.