There's related issue - PowerDraw3 had problems with TransparentColor - not always the transparent color you specify was actually considered transparent (due to conversions error). The new version of Asphyre uses "Tolerance" in addition to TransparentColor in order to assure that the image will still be transparent (antialiasing is also provided, so that if you specify Tolerance of 50% - colors that were only 25% different will be drawn at half of their opacity).