I have a Studio that I purchased this summer. Recently, every so often, the screen will change. The best way I can describe it is that the contrast is changing...any color close to white (light gray, light blue, etc.) will suddenly appear white. I can barely make out the "Help and Support" link on my start menu and when I have tabs open in Firefox I can barely distinguish them from the background (I have a light gray skin on my Firefox). I assumed the issue had something to do with running on battery power, since that was where I noticed it happen first, however today it did the same thing while charging.
I tried dimming the screen because that was initially what I thought the issue was...that snapped the display out of it once, other times it has corrected itself, but the last time I restarted my computer to fix it.