A question about kdm login screen

Hey. I’ve had a minor issue with kdm, it’s repeating itself every time I update KDE releated packages from factory.
I turned off themed greeter using kdesu systemsettings. It was set to no logo, no clock and a simple color background.
Every update resets this to default_blue background and clock. Also the log starts complaining about multiple occurrences so I need to edit kdmrc.
Should I backup the file and just overwrite every time or is there any other way to solve this?

Multiple occurrences of key 'Language' in section [X-*-Greeter] of /usr/share/kde4/config/kdm/kdmrc
Multiple occurrences of key 'ShowUsers' in section [X-*-Greeter] of /usr/share/kde4/config/kdm/kdmrc
Multiple occurrences of key 'UseBackground' in section [X-*-Greeter] of /usr/share/kde4/config/kdm/kdmrc
Multiple occurrences of key 'UseTheme' in section [X-*-Greeter] of /usr/share/kde4/config/kdm/kdmrc
Multiple occurrences of key 'NoPassEnable' in section [X-:0-Core] of /usr/share/kde4/config/kdm/kdmrc

Note that this happens on 11.2 factory KDE 4.3 RC2 and also used to happen on 11.1 KDE 4.2