I was just about to post something similar. I encountered the same problem with 3 white spots
on the display. They are visible the best if you have a white or light gray
background.
The first time I thought its some touch marks but cleaning the display is not a solution.
It is difficult to get it on a picture but I think the last one with high contrast makes it
very easy to identify. I have not yet contacted support, but I guess this can
only result in a screen exchange.
http://geoschnitz.de/content/images/2016/02/DSC_3073.png
http://geoschnitz.de/content/images/2016/02/contrast_adjustment.png
http://geoschnitz.de/content/images/2016/02/markierung.png
http://geoschnitz.de/content/images/2016/02/DSC_3068.png
(btw: the image Upload is not realy working for me)
