What you see there are UI
Images in a
Canvas. The weird thing is that the red cross image looks OK, but the card with the red outline doesn't.
I've tried setting mipmaps to true, and Anti-aliasing set to 8x or 4x, with no difference. I hoped this was only in the editor, but a build shows the same jaggies.
Has some setting changed in 5.6 that I can edit so my graphics look anti-aliased again, or is this a bug?