Dave, I found a bug in the new drivers that I did not notice in the 10/13 5800 series only driver.
I get a flicker/blink on the display port monitor in some situations.
Dragging a window behind the windows taskbar will cause it to randomly clip and blink a tad, also I have seen the flicker/clipping behavior in game a few times, It only happens on my display port monitor and it so far has only happened on the lower part of the screen.
Is there a good place I should go place this bug report, or could you perhaps take it straight to the place where it should be and skip that middle man.
Try disabling ATI Overdrive ... it does it also with older releases... known driver bug. If you really want to use it you can manually enter the correct values for GPU and memory clock by creating a profile or else the values are incorrect when using multiples screens. I personnaly will wait for a good driver release.