P4-1.7GHz, 512MB, 128MB Radeon 9600 Pro, WinME, DirectX 9.0
Same problem here with the flickering ground cover. It looks like each terrain tile now has some sort of 2nd skin on it, kinda like the "bases" under airfields and strat factories. "These terrain bases" are what are doing the flickering, not the trees and stuff on top of them.