sorry, was away for 2 days
but I have a screen res of 1366 / 768 at 1024 / 768 I dont have the problem. I always have the same colour depth, cos i dunno how to change it and what it does, so that will be factory of a screen of a recent acer laptop. I have 60hz and have the problem nor on my pc(1920/1440) or any other 4:3 res, nor on 1024/768.
I'm having the problem as long as i have glest (+- 1 year)