I'm not sure if this is just my problem, but I went back to a previously-won game that was up to about 1000 turns, well into the modern era.
Among the things I noticed there was the fact that I could build the UN and the Sydney Opera House. Again. As in, after I had built both of them. Sure enough, I have two of each, now, and the other cities that housed them still have their own.
I'm wondering if this will have any effect on the Diplomatic Victory-- as in, even if I already have it, will another civ be able to build it, too?
And here's the worst part: I can build unlimited Oxford Universities now. As in, one will finish, then the icon will be available to select again.
Huh.
My other problem was that I wasn't able to build the Circus Maximus or National Treasury, despite having the requirements. Their icons weren't even there. I'm assuming, though, that this is because my game had already been started. Would've been a nice addition, though.
Anyone else see anything like this?
J