It seems I have got an Apple issue on a Lenovo Thinkpad, that's funny... http://forums.macrumors.com/showthread.php?t=824940
My X201s (one year old, still under warranty for the next two) has the left side of the screen (1440x900) with a yellowish tint starting on the left border with an evident shadow and slowly decreasing to the normal white more or less at the center of the screen. The right side looks normal.
Just in case it may be related:
I notice a clicking noise when I close the lid (not when I open) occurring exactly when the lid passes the 90 degrees angle. The more quickly I close the more higher is the noise.
Two slightly dark large rounded shadows (of different size) on the right bottom appear sometimes, not always.
The yellowish tint is light, but clearly there, while reading and writing on white background (what I do 99% of the time with my laptops) is very annoying.
What could it be?
And what can I do?