Bookshelf-1.10.2-1.4.4.347.
ThermalExpansion-1.10.2-5.0.4.90-universal
ThermalFoundation-1.10.2-2.0.5.81-universal

I don't know what is happening but I have traced an issue with Tar and Rosin from being used as fuel to this mod.

What is the actual issue? Is it a crash? This mod doesn't do anything with fuel, which is confusing.

It make it so you can't put Tar or Rosin in to the fuel slot in furnaces or any there block that would allow you to use it as fuel. Crafting is fine still.

How have you come to the conclusion that this mod is responsible for the issue? Also, are you sure this is the right repo? I do nothing even remotely related to fuel, or the mods you have mentioned. There is another mod with the same name as this one, which you may be looking for?

Process of elimination, I notice the issue after we added Dark Utilities to the modpack. Removed that mod and the issues was still there, remove Bookshelf and it removed the issue.

I'm pretty sure you can safely close this one down. I addressed a mapping issue in CoFHCore a while ago. This was probably it.

Oh okay, thanks for the heads up.