My experience with Civ4 is limited, but last year, when I played a few games in solo, the game rarely crashed, even when I would play for hours (that's when I was unemployed
). Not sure about the memory leak (I only have Vanilla). I think it should be either your hardware, either Cedega. Let's hope it's the former, otherwise this means I'll have to stick with Windaube as long as I'm playing Civ4.