Hi, I have ArchLinux. I updated my system and then discover stopped working properly. It shows me an Error "you have no authorization to execute this operation" when I try to install an application. Previously, Discover prompted me to enter a password. I ran it in a terminal and then it wrote to me "PackageKit error: PackageKit::Transaction::ErrorNotAuthorized "you have no aurhorization to execute this operation" "Failed to obtain authentication." I think it is a critical bug because discover can't do what it is intended to do - installing a programs. Discover just became useless.
*** This bug has been marked as a duplicate of bug 442383 ***