Thanks for that fix Afforess (regarding spy specialists) as that was one of the things I was going to report. Hmm, I changed a python file, that makes me practically a programmer now!
Er, anyway.
I did have one other unusual bug last night. There was a 3x3 area on the map where the fog of war was unclearable. I mean, if my horseman (or other unit) was right next to it, it was still dark. If I moved INTO the area, I couldn't even see my own unit (though it still came up on it's turn in the rotation). The area was centered on the city of Nanjing, originally a Chinese city that was owned by the Americans. The Chinese had been vassals of the Americans, though I'm fairly sure the capture of Nanjing happened before the submission.
Opening world builder at the time changed nothing (I could see the city in WB, but when I closed it it was "masked" again. At some point later in the game it fixed itself. It's nothing major, but it was certainly odd.
Anyway, I have a screenshot and a save at home if you need to take a look at it, just say the word.