Mine's set for 4X and still does it on ATI Radeon 5870. This problem and the Dynamic Lighting crashes have been around long enough for Cryptic to know about it.
Ah well, was worth a try. I had dynamic lighting crashes too, an update from Nvidia fixed it for me. I wouldn't really blame Cryptic for either of those issues. /shrug (And yes I hate ATi with a passion, I always had driver issues with them ever since they joined with AMD, good cards, bad, bad drivers) :p
I've been getting flickering shadows since this game was in beta. Several hardware/computer/parts upgrades and changes later, the flickering shadows are still there. It's definitely a problem with the game.
The whole joke is that despite upgrading to a top of the range system with a 3GB GPU I'm still getting these issues. It's funny because out of all my games, this is the only one I have problems with and out of all my games this is the 1 game that runs the coolest on my GPU compared to the rest, all the other games push my GPU harder yet run flawlessly lol. It needs to be fixed.