Ahriman
Tyrant
It looks like freshwater and nonfreshwater yields for lumbermills and mines were added (at iron working, metal casting, printing press and gunpowder), but without removing the steam power and industrialization boosts, so now these improvements are giving +3 production.
I don't think that is intended.
[And if it was, it shouldn't be.]
I don't think that is intended.
[And if it was, it shouldn't be.]