Originally Posted by Shaggy
Which doesn't really prove anything (you believe website polls are scientifically accurate?). For all we know those could be cases of faulty hardware, subjective mis-impressions on their parts as to the contrast changing, or people just making up responses to the poll.
Faulty hardware or mis-impressions are just as valid for the original poster, who is trying to determine the likleyhood of him experiencing the same issue, whatever the reason.
I agree, it's rare, and doesn't seem to be a systematic problem. However, I am cognizant of the fact that such a problem could become more likely in later years, so I think it's too soon to draw any strong conclusions about the lifetime contrast of such screens.