[Crow]

If you use for example Paint Shop Pro or Photoshop or something similar to set transparency to the image. If you dont, so for example the image appears with a light green background in Graal, it would work perfectly.

Edit: Problem is, if you got an image, and transparency is set as described above, and you modify it with a script (either alpha, zoom, probably also rotate or anything else) then parts of the outline are removed. What I first thought when I saw this bug was that Graal would create alpha maps for the images on the fly and that the alpha map would be off one pixel to the right and one pixel to the bottom, so practically over the image (where it shouldnt be transparent).