I have a problem with KDE not obeying, or even circumventing, permissions.
If I open a terminal, su to root, and type "chmod 700 /usr/bin/kwrite" and then confirm with an "ls -l" that the permission has been changed, I can still launch kwrite from the menu. The same applies to kmix and konqueror, but not to gimp, so it looks as if it's KDE native applications which are affected.
Have I got a problem on my system (well, yes I have) or is this happening to others as well?
The applications so launched aren't run as root - ie I can't open files such as menu.lst with kwrite, so it's not necessarily exploitable, but it does prevent administrators controlling who can run what.