In thinking about getting an rMBP, this image retention problem has me concerned. I lived through the CRT phosphor imaging problems for years and don't want to repeat that experience.
I saw this in Wikipedia, and it's the same as in other publications (like LCD manufacturers).
Image persistence can usually be reversed by allowing the liquid crystals to return to their relaxed state. In other words, turning off an LCD display for hours or days will relax the crystals and eliminate the image retention. For PC monitors, it is also ideal to rotate desktops, and hide away elements on the screen which normally would be displayed perpetually (like the taskbar in Microsoft Windows or the Dock in Mac OS X). The usage of a screensaver that has a constantly changing image can help as well.
Another approach to removing LCD image persistence is to first create a solid white image and display the image as a screensaver covering the entire display area for an extended period of time.
Has anyone tried this "solid white image" technique to see if the image persistence lessens or disappears?
I thought the "turning off the LCD for hours or days" was pretty funny. Like that would ever happen with a rMBP.