Bug#648464: gnome-shell: Authorization asks me for another user password

[Manolinux]

Package: gnome-shell
Version: 3.0.2-5
Severity: important

When I try to change a system configuration, it asks me to enter the password, but not for my user, but for another user which is also in the sudo group. There is no way to select my user.

Both the other user and me are in the sudo group.

It only happens in Gnome 3 authorizations, other applications such as update manager work as expected.

I have UID 1000 and the other user has UID 1001.

-- System Information:
Debian Release: wheezy/sid
  APT prefers testing-proposed-updates
  APT policy: (500, 'testing-proposed-updates'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.0.0-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=es_ES.utf8, LC_CTYPE=es_ES.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gnome-shell depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.7.5-3     
ii  gconf2                                       2.32.4-1    
ii  gir1.2-atk-1.0                               2.2.0-2     
ii  gir1.2-clutter-1.0                           1.8.2-1     
ii  gir1.2-cogl-1.0                              1.8.2-1     
ii  gir1.2-coglpango-1.0                         1.8.2-1     
ii  gir1.2-freedesktop                           0.10.8-2+b1 
ii  gir1.2-gconf-2.0                             2.32.4-1    
ii  gir1.2-gdkpixbuf-2.0                         2.24.0-1    
ii  gir1.2-gkbd-3.0                              3.2.0-1     
ii  gir1.2-glib-2.0                              0.10.8-2+b1 
ii  gir1.2-gnomebluetooth-1.0                    3.2.1-1     
ii  gir1.2-gtk-3.0                               3.0.12-2    
ii  gir1.2-json-1.0                              0.14.0-1    
ii  gir1.2-mutter-3.0                            3.0.2.1-4   
ii  gir1.2-networkmanager-1.0                    0.9.0-2     
ii  gir1.2-pango-1.0                             1.29.4-2    
ii  gir1.2-polkit-1.0                            0.102-1     
ii  gir1.2-telepathyglib-0.12                    0.16.0-1    
ii  gir1.2-telepathylogger-0.2                   0.2.10-2    
ii  gir1.2-upowerglib-1.0                        0.9.14-1    
ii  gjs                                          1.29.0-2+b1 
ii  gnome-bluetooth                              3.2.1-1     
ii  gnome-icon-theme-symbolic                    3.2.1-1     
ii  gnome-settings-daemon                        3.0.3-3     
ii  gsettings-desktop-schemas                    3.0.1-1     
ii  libatk1.0-0                                  2.2.0-2     
ii  libc6                                        2.13-21     
ii  libcairo-gobject2                            1.10.2-6.1  
ii  libcairo2                                    1.10.2-6.1  
ii  libcamel-1.2-23                              3.0.3-1     
ii  libcanberra0                                 0.28-3      
ii  libclutter-1.0-0                             1.8.2-1     
ii  libcogl-pango0                               1.8.2-1     
ii  libcogl5                                     1.8.2-1     
ii  libcroco3                                    0.6.2-2     
ii  libdbus-1-3                                  1.4.16-1    
ii  libdbus-glib-1-2                             0.98-1      
ii  libdrm2                                      2.4.26-1    
ii  libebook1.2-10                               3.0.3-1     
ii  libecal1.2-8                                 3.0.3-1     
ii  libedataserver1.2-14                         3.0.3-1     
ii  libedataserverui-3.0-0                       3.0.3-1     
ii  libffi5                                      3.0.10-3    
ii  libfontconfig1                               2.8.0-3     
ii  libfreetype6                                 2.4.7-2     
ii  libgconf2-4                                  2.32.4-1    
ii  libgdk-pixbuf2.0-0                           2.24.0-1    
ii  libgirepository-1.0-1                        0.10.8-2+b1 
ii  libgjs0b [libgjs0-libmozjs7d]                1.29.0-2+b1 
ii  libgl1-mesa-glx [libgl1]                     7.11-6      
ii  libglib2.0-0                                 2.28.8-1    
ii  libgnome-desktop-3-0                         3.0.2-2     
ii  libgnome-menu2                               3.0.1-3     
ii  libgstreamer0.10-0                           0.10.35-1   
ii  libgtk-3-0                                   3.0.12-2    
ii  libical0                                     0.44-3      
ii  libjson-glib-1.0-0                           0.14.0-1    
ii  libmozjs7d                                   7.0.1-4     
ii  libmutter0                                   3.0.2.1-4   
ii  libnspr4-0d                                  4.8.9-1     
ii  libnss3-1d                                   3.12.11-3   
ii  libpango1.0-0                                1.29.4-2    
ii  libpolkit-agent-1-0                          0.102-1     
ii  libpolkit-gobject-1-0                        0.102-1     
ii  libpulse-mainloop-glib0                      1.0-4       
ii  libpulse0                                    1.0-4       
ii  libsoup2.4-1                                 2.34.3-1    
ii  libsqlite3-0                                 3.7.7-2     
ii  libstartup-notification0                     0.12-1      
ii  libtelepathy-glib0                           0.16.0-1    
ii  libtelepathy-logger2                         0.2.10-2    
ii  libx11-6                                     2:1.4.4-2   
ii  libxcomposite1                               1:0.4.3-2   
ii  libxdamage1                                  1:1.1.3-2   
ii  libxext6                                     2:1.3.0-3   
ii  libxfixes3                                   1:5.0-4     
ii  libxi6                                       2:1.4.3-3   
ii  libxml2                                      2.7.8.dfsg-5
ii  python                                       2.7.2-9     

Versions of packages gnome-shell recommends:
ii  gnome-control-center   1:3.0.2-3
ii  gnome-themes-standard  3.0.2-1  

gnome-shell suggests no packages.

-- no debconf information