Weird behavior to report: 1. Make a powerstroke (example: triangle in) 2. Make a duplicate (ctrl+D) 3. Move some of the nodes of the second powerstroke 4. Modify the width of the second powerstroke Behavior: the width of the first powerstroke gets modified as well. This does not happen if you select and move the second  powerstroke with F1 before modifying its width. This does not happen with ctrl+C. I was trying to trying to do easy eyelashes by making one  powerstroke the shape I wanted, duplicating it, moving the end  slightly and modifying the width slightly (to have a bit of variety). I was also trying to do some sketchy effects with the same method. Any clue?