I have the Viewsonic GS790 (a great monitor, btw) and just installed WinXP. I changed the Detonators to the 22.80's, reinstalled the monitor's .ini files and noticed a pronounced fluttering @85Hz. 85Hz was always good enough in the past on my Win98SE machine, but I notched it up to 100Hz on my new computer and the fluttering disappeared. My question is.....Does a higher refresh rate have any long-term effect on the monitor? Just curious.