Little Raven
On Walkabout
Or at least that's what I thought at first. 
I'm one of the luckier ones, and for the most part, Civ IV runs with no problems. I have an NVidia 6600GT graphics card and a gig of memory.
However, as the game progresses, rivers will occasionally turn black. Just rivers, and a reload will fix it, though it will generally return. Any ideas?

I'm one of the luckier ones, and for the most part, Civ IV runs with no problems. I have an NVidia 6600GT graphics card and a gig of memory.
However, as the game progresses, rivers will occasionally turn black. Just rivers, and a reload will fix it, though it will generally return. Any ideas?