Why is this gamma correction shit not a Solved Problem yet? I've been fighting this, and being angry that I have to know anything about it at all, for at least ten years. Surely people who do this for a living get even more head-explodey over it than I do? Why has this outrage not translated into it being fixed? Get out of my face and just do the right thing already, you stupid computer!
Now I get to decide whether to go back and edit a zillion pictures, under the assumption that the way my monitor is set now is more "right" than before. Which would mean adding another round of JPEG compression, since I didn't save the large versions, and taking the risk that they'll end up being illegibly darker on people for whom they looked ok before.