I agree completely with Craig's last comment, I get the exact same thing on Ubuntu MATE 15.04 when trying to select an area to grab using mate- screenshot
~$ dpkg -s compiz Package: compiz Status: install ok installed Priority: optional Section: x11 Installed-Size: 128 Maintainer: Ubuntu Developers <ubuntu-devel-disc...@lists.ubuntu.com> Architecture: all Version: 1:0.9.12.1+15.04.20150410.1-0ubuntu1 Provides: x-window-manager Depends: compiz-core (>= 1:0.9.12.1+15.04.20150410.1-0ubuntu1), compiz-plugins-default (>= 1:0.9.12.1+15.04.20150410.1-0ubuntu1), compiz-gnome -- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/771875 Title: Compiz Screenshot renders blue overlay on screenshots To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/771875/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : compiz@lists.launchpad.net Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp