>>2216117No, the original image in this case was composed in a slightly non-standard color format (Adobe RGB).
I'm no expert on these things, so I left it alone, but seems like some programs (and 4chan) don't like Adobe RGB.
One more try, I converted the image to GIMP sRGB this time. Let's see if 4chan takes it. If it looks good with this one, then I'd recommend using this over the others for compatibility across programs.