Installing packages as one user requires the password of another user

[Jochen]

In a newly set up kubuntu system, the first user set up was, say, "X". This was automatically endowed with admin rights, and packages can be installed/deinstalled as this user.
After setting up another user Y with admin rights (using the advanced user management tool), logging in as this user and running kpackagekit, if I want to install/deinstall anything I'm asked to supply a password. This only works with the password of user "X" rather than "Y"'s own password.
The dialogue asking for the password gives no indication of who's password it is asking for, but from a security point of view anything but "Y"'s password would not be reasonable, so I guess this is bug.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: kpackagekit 0.5.4-0ubuntu4.3
ProcVersionSignature: Ubuntu 2.6.32-34.77-generic 2.6.32.44+drm33.19
Uname: Linux 2.6.32-34-generic i686
Architecture: i386
Date: Fri Oct 7 11:47:04 2011
InstallationMedia: Kubuntu 10.04.3 LTS "Lucid Lynx" - Release i386 (20110720.1)
ProcEnviron:
 LANGUAGE=
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: kpackagekit

[Daniel Nicoletti (dantti)]

This is a PolicyKit-KDE bug, please reasign.

[dino99 (9d9)]

This version has expired some times ago, and no backport is expected as there is no 'security' reported problem