It is likely related to your video source, Kevin. What kind of camcorder did this video come from?
Also, is there a red line above your clips on your timeline? This indicates that the sequence needs rendering.
To render, press the Enter key. The program will create a preview of the clip that is more like your final output and the red line will turn green.
Along with Steve's tips, please insure that your video driver is the very latest. PrE works much more closely with the driver, than simple playback programs.
Hi all thanks for the help sorry Im a bit slow in getting back to you who have replayed.
I rolled back the ATI driver 10.1, and the monitor screen was sill the same, but to cut a long story short I rolled back to 8.561 and that cured the problem.
You should probably copy your note about ATI drivers to the 'non Nvidia problems discussion'.
Insanity is hereditary, you get it from your children