KDE4 - wrong root password?

["Hans-J. Ullrich" <hans.ullrich@loop.de>]

Hi folks, 

since some time I discovered a strange behaviour. Whenever I want to kill a 
process, or need root privileges (i.e. with kdesu) and I need to enter my root 
password, this is not accepted. 

But - when I use the password of the user I am working with in this cases, it 
will work. This is very strange! The normal user can do things, that root 
cannot do (only in KDE).

I admit, it might be a setting problem in KDE, but I cannot remember, to 
configure or change anything related to this behavior.

Can someone give me a clue, what I can check, to get back to normal behavior?

This problem appears only on my amd64-machine, my other two machines are 
working fine. 


Thank you very much.

Regards

Hans