Catalyst 11.12 Flickering
The latest AMD Catalyst Drivers (11.12, released Dec. 13) make the foliage and ground flicker in DoP when any kind of Anti-aliasing is turned on. This flickering did not occur before the release of these drivers. The problem can be remedied by turning AA off completely, at least on my machine.
I ran the same test with Din's Curse and AA works fine with the newest Catalyst drivers, so the problem is exclusive to DoP.