Strange outline around screenshots with alpha transparency about ephtracy.github.io

[rebelbinary]

The outline is because of the Anti aliasing is fading the color as well as the alpha when it should only be fading the alpha. To reproduce make a cube one color, set AA, take screen cap, open the image and put the same color background behind it. You will see it's fading the color to white around the edges. Using a image editor (ASEsprite) you can see the edges are not the same color as the faces, but instead are fading to white.