QUOTE:I know nothing of "Surface"...
It is only (I guess it is) in your browser (on some websites) where the flickering occurs?
IOW, other programs that you have on this Surface do not flicker?
Are you able to test the sites that flicker in a different browser?
Does the browser have a "Safe Mode"?
http://kb.mozillazine.org/Safe_modeIf so, worth a try.
A few particular sites where you see this happening?