Special combinator to give information about items, fluids, receipes etc
Mods introducing new content into the game.
Entities which interact with the circuit network.
When first opening the recipe combinator configuration window, the UI for selecting crafting machines does not have a blank button for adding a new building. You have to first change or remove an existing building filter before you can add new ones.
Thanks for the report. I introduced that bug in 0.1.7 when trying to fix another bug, and I've fixed it in 0.1.8.