I've actually never had any problems with Civ IV up until I installed the 1.6 patch (which is why I joined this forum). Now the game doesn't show resources on the map like it used to (I cna toggle the option but it's not as easy nor no where near as cool as when the map showed all the stuff in 3-d). It only shows roads now.
Second, I can't play single player any more b/c the 10 turn limit is activated and I can't turn it off, even when I set the cfg file to 0. (I can play past it, but it stops keeping score, "just a few more turns"). I do not have this problem when I play lan because there's a specific option allowing u to choose the turn limit and before every game I set it to zero, but there's no such option found now in single player.
Third - I was playing a LAN game that crashed on turn 325 AD - I reloaded an autosave and it crashed again on the same date, every single time repeated. This has also never happened to me and I have no idea why.
But I thought I'd add my two cents and let you know I was having the same graphics problems with resources as well.
Cheers,
Coledaddy007