I Have in the File "/etc/sudoers" an Entrie likes 
"username ALL = (ALL) NOPASSWD: ALL"
By the example-command  "kdesu 'kdf -caption "%c"'" so kdesu do not ask for the root-Password. This is in openSuse 10.3 an in openSuse 11.0 RC1 32 an 64bit so.
After an Update to the openSuse 11.0 GM Version (32 and 64bit) kdesu do not care of the Entries in the "/etc/sudoers", kdesu ask every Time for the root-Password an it seems that kdesu ignored the entries in the File "/etc/sudoers".


+++ This bug was initially created as a clone of Bug #267399 +++

Not only sudo but also kdesu should take care about the /etc/sudoers file.
This will be especially useful when performing online updates via SuseUpdater. An entry for "/sbin/yast2 online_update" should also relieve from typing the root pwd when using the graphical frontend rather than the text interface. This will of course also be possible if SuseUpdater tried a sudo before invoking kdesu, which would however pose a specific and therefore less desirable solution.
  At the moment something seems to be completely messed with kdesu in OpenSuse10.2, because it does not even accept correctly typed passwords like su does!