So I posted this…
…and it appeared as a negative image, yet clicking on it makes the original version appear. I thought maybe if I switched out of Black mode it would display correctly, but switching to Dark, Darkmosa, and even Classic had no change on it. Then I logged out, and it was still the negative image.
I imagine I could fix it by editing the file (it’s just a random thing I got from an image search), but is it actually supposed to do this, or is it a bug?
That image again:
Same image with metadata stripped:
Its “color space” is CMYK instead of the usual RGB, if that makes a difference.