I used the help index to look up how to change dithering. I tried changing from error-difusion, ordered, & none. I also tried changing the quality setting--got below 50% with no change. unless you have another means of changing the dithering these were both unsuccessful. I also must correct myself...the 'phantom' outline does occur for other lighter colors. fortunately dark colors which is the intended color for this vase as of yet show no 'phantom' outlines (have not yet put in any background color). so this remains a bit of a mystery
nance