For me, it occurs always when using rectangular selection. But gnome- screenshot does not hang, it continues working, leaving save/copy to clipboard dialog and barely visible transparent window.
** Attachment added: "Screenshot" https://bugs.launchpad.net/ubuntu/+source/gnome-screenshot/+bug/1392053/+attachment/4431896/+files/overlay.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1392053 Title: gnome-screenshot sometimes hangs leaving a transparent white square over the screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-screenshot/+bug/1392053/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs