I know it's not as crucial as some of the problems others have been having, but sometime around turn 600 in the sandbox game my gold income suddenly changes to 1 per turn. The resource bar still has a different number listed (ie. 52.4/turn) but no matter what I do I can't get it up or down. needless to say this makes large fights a bit difficult since it takes hundreds of turns for me to replace my armies (which is were i first noticed it; i was raking in enough money from the battles, it was only after the conflict was over and the supplemental income was gone that i ran into trouble).
On a related note, even though i was playing on easy, the ai doesn't seem to be restricted by gold income, their income rates never seem to be a problem for them even though their armies are much bigger and i've seen them post a large negative gold deposit in the trading window (which i wouldn't mind too much if they were willing to pay through the nose to fill the whole.... maybe they're borrowing from china too?
) - seriously though, is that a bug, or is just easier to let the AI cheat all the time but just make it lazy/stupid for those of us with poor strategerizing skills?