I suspect that in some cases the problems are more severe. However, I have read more than one post about people who have to look hard in a dark room to find the problem. Personally I have a little light unevenness at some brightness and if I look at the screen in the right light at the right angle I might notice a slight magenta tint. However, if I just use the device and don't look for these issues the reading experience becomes very enjoyable and smooth. I can deal with those rare moments of OCD when it bothers me. :-)
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