Window capture : round top corners aren't transparent
When I take a screenshot of a window with Cinnamon Screenshot (Gnome Screenshot), the two top round corners aren't transparent in the resulting PNG file. The PNG file should use a transparency layer but it doesn't.
See screenshot at https://github.com/linuxmint/muffin/issues/572 and https://bugs.launchpad.net/kazam/+bug/1900284
Edited by InfoLibre