I have some bugs to report.
The pictures for the Modern and Future eras are missing. In their place, there is only a blank space:
The Incan Renaissance/Industrial fort lacks textures at its base, making it appear green:
The Burger King occasionally seems to think that he is in a diplomatic meeting with himself:
There's a formatting error in least one of Genghis Khan's historical quotations:
I'd also like to report a few things that look like, but may not be, bugs.
Civs that use Middle-Eastern architecture such as Arabia, Sumeria, and Egypt will build European-style castles while still using Middle-Eastern walls:
Since I have never seen a Middle-Eastern castle, I'm not sure whether they actually exist. It may or may not have been the intention for European and Middle-Eastern civs to share castle architecture.
A lot of non-American civs (e.g. the Incas) use the White House as the Modern era Palace, complete with the Stars and Stripes hanging by off the flagpole. If this isn't a bug, I would like to make the suggestion that the White House be either exclusive to the Americans or remove the Stars and Stripes.
The Incan lighthouse appears to be nothing more than a big stone block:
Compared to, say, the Egyptian lighthouse, it doesn't look very functional at all, and I wonder if perhaps the stone block was assigned as a lighthouse in error:
Finally, I'd like to make a couple of suggestions.
The walls of some civs like Inca and Zulu are turned into barbed wire in the Modern era, while the majority of other civs get to keep their stone walls intact:
I feel that this is unfair and inconsistent treatment because the barbed wire is so much uglier than the stone walls, whose only purpose in the late game is to make your cities look nice and historical. It is also unrealistic, in that I have never heard of a city tearing down ancient walls and putting barbed wire in their place. Can you imagine what would happen if they tried this in Istanbul or Jerusalem?
Wonders, especially in big cities, are too prone to being swallowed up by the other city buildings as the game progresses. Some big wonders like the Three Gorges Dam usually doesn't make a visual appearance at all at any point in the game. If possible, the cities should prioritize wonders and player-built buildings over stock buildings that the city generates on its own.