To reproduce: 1. In AP, add a mask to a light-colored JPG so it has transparent edges. Save as an AP doc. 2. Drag the AP doc's Finder icon onto a dark-colored AD doc. Result: AP doc appears as an embedded doc in the AD doc. It is bordered by a thin light-colored line. The border hairline is actually the color of the original image behind the mask. The border line remains despite zooming or resizing, and appears in exported JPGs. Work-around: Apply a rectangular vector mask to the embedded AP doc, inset just slightly from the object's edges. Designer: 1.4 Photo: 1.4 Mac OS: 10.11.2 Apart from this, wonderful software! Thanks for looking into this, Craig.