I was just watching Gladiator, and noticed how much the screen is flickering while a DVD is playing. This is extremely noticable when the picture is bright and high-contrast. My display is set to 100Hz, and both my video card and monitor support that refresh rate at my resolution. I also installed the RivaTuner fix, that is supposed to force the hardware to use the highest possible refresh rate at any resolution. In other words - why the hell is this happening?