Okay, I was playing as America on the 600 AD start (with the latest revision, obviously). I settled Washington, declared on England as their cities flipped, declared on France to conquer New Orleans, found that Poland was partitioned between Russia and Prussia

lol

, yada yada yada.
But then, the Incans respawned, and they had an abnormally high score. By abnormal, they had a score around 1900 while England, the next highest-scoring civ, had a score around 1400. I was confused - how can the Incans, usually being a very small civilization, can have a far greater score than a civ that had like three cities on every continent? (I was right about the size difference - when I bought a map from France, their master, it showed that they had only Tuceme and Qusco.)
It turns out that when they respawned, they received every tech on the tech tree except Future Tech. So yeah, that's a screwy bug. Good thing that the Incans aren't building any spaceships soon with those two cities
And two other things that may or may not be bugs:
1) There were far fewer natives than I was used to. I've only saw one Mohawk and one native over a ~100-year time span.
2) Why are there five and four food resources on the tiles north and south of Los Angeles. I'm talking about unimproved land, with no resources, and this is post-Biology, mind you.