The problem is only present in Unity; logging on to Xubuntu there is no sign of it. So I guess it is a Unity issue?
** Package changed: xorg (Ubuntu) => unity (Ubuntu) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1385457 Title: "Show desktop" shows remains of previous windows not wallpaper To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1385457/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp