P: White dot in bottom left corner

Same dead pixel panic. Jeepers.

I have the same problem on a 2014 Retina iMac. Just updated Lightroom today and white pixel is still there, right in the bottom left corner. Annoying!

Just noticed the same issue on a brand new iMac 5k and freaked out. Seriously, Adobe can't fix one little pixel? I mean, I get that doesn't really affect anything within the program, but making people think that a brand new display is defective is kind of a problem!

I just noticed the exact same thing, googled, and found this thread. It seriously hasn't been fixed in three months?

I just purchased a new MacBook Pro and when I began using Lightroom, I saw the same thing and thought I had a bad pixel, too.  It seriously freaked me out for a second until I realized when I closed the program, it went away.  But still, I figured such a big company could work out small problems like this.

Sorry, I'm not an Adobe employee! I was just guessing how Auto Tone works. 😉

Thanks for the detailed answer! But ACDSee can do that. And you at Adobe can't? You shouldn't just fill the full range if it works bad for 100% images. Find any different approach.

For example, you can perform this step in different moment. Auto feature makes a lot of other corrections (by the way, it does it perfectly). Maybe they interfere with what you tried to explain.

Auto Tone is not a magic wand. It does exactly what it's supposed to do, which is, roughly speaking, to spread out the brightness values in the image so that they occupy the entire range from black to white, while more or less preserving the ratios between values. This does sometimes result in a too-bright image, but that's usually because all the values in the image started out bunched up against the left side of the scale — meaning that the image was severely underexposed and lacked highlights.

It would be really hard to write a program that would with one click optimize every image so that it looks perfect to you.

If it causes false evaluation of display as defective then it's really serious and it brings valuable damage. But if you want to fix more serious issues first then fix Auto Exposure feature! It works wrong for years! 100% of images are overexposed after using this feature. It's so nasty to correct it manually EVERY time by so huge values like 1.00 or little less.

Well, to be fair, it's not really so serious. Most people never notice it. It's a very minor visual issue.

The Lightroom development team(s) will surely have a TON of things they need to work on. I would not expect a fix before several months have passed.