Cyg: Or they just have some naff interface code... The problem doesn't exist in DX 9 (apparently).
Lowering the Render Ahead fixed the issue, so it's the same problem. I see it in other pro titles too, though I don't have a list :)
retro.hack , True, however;
The TFT still has to receive the information, and to do so it uses the 60hz signal. The data can therefore only update the same speed as a TV- pixels at the bottom of the screen may well be from a previous frame.