krunner (kde4) question

[Paul Kaplan]

In kde 3.5, entering "kdesu <command>" in the earlier equivalent of krunner 
resulted in the command being run suid root, the same as running "sudo 
<command>" in a terminal.

In kubuntu 8.04, running kdesu in krunner in kde4.1 seems at best 
inconsistent.  Sometimes the command executes (as in calling konqueror) and 
sometimes it doesn't (as in calling dolphin). Nevertheless, sudo works fine.  
In kubuntu 8.10, kdesu in krunner doesn't seem to work at all.

Has anyone seen this problem?  Solution?

Paul