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Problem: No Administrator button for Login Manager and other settings in Kubuntu 8.04.  Known bug, oddly assigned Low priority.

Workaround: From command line:

/usr/lib/kde4/lib/kde4/libexec/kdesu /usr/lib/kde4/bin/systemsettings

Found on tboxmy blogspot:

Everyone is using Thunderbird on MS Windows, Ubuntu Linux and Fedora Core Linux. So, why shouldnt Centos 5.1 be able to install?

1. Download Thunderbird 2 from Mozilla (http://www.mozilla.com/en-US/thunderbird/) or other mirros like (http://mirror.oscc.org.my/mozilla/thunderbird/). I downloaded thunderbird-2.0.0.14.tar.gz to the directory /tmp.
2. Extract the files
3. Open a terminal and login as root to the directory /opt
   

   su -
   cd /opt

4. Copy the extracted forlders to /opt
   

   cp -rf /tmp/thunderbird /opt

5. Install the older library of libstdc++.so.5 (5.1 comes with version libstdc++.so.6)
   

   yum install compat-libstdc++-33.i386

6. Test the Thunderbird as a normal user
   

   /opt/thunderbird/thunderbird

7. Copy the icons to the user wide pixmap
   

   cp thunderbird/icons/mozicon*.xpm /usr/share/pixmaps/

8. When Thunderbird starts, it complains about the mode for /var/spool/mail, as it cannot write to this folder. As root do the following
   

   chmod 01777 /var/spool/mail

Add the application launcher in the panel/menu using the mozicon icon. Only things left is to install other plugins.