Not so much a bug, but it's still a problem.

I managed to play a huge map custom game up to the year 1700, and as soon as i traded world maps with another civ the game slowed waaaay down. And now when I exit the program and load the game it plays very slowly. I've tried turning the graphics all the way down, but it's no use. It's nearly unplayable. Here are my system specs:

Celeron 2.4ghz
ATI all in wonder radeon 9200
512MB RAM

Do you have a save of just before you traded?

Sadly, I do not. I can send you a copy of the savefile from a few turns after the trade. Or I can play again, and then save right before a similar trade, and let you know what happens after the trade?