The Startup and Shutdown kcm provides an option to run a script when logging out. When I check that, however, the script seems not to be run on shutdown but when I log back in again and when I checked the settings, it was on Log in again.

Reproducible: Always

Steps to Reproduce:
1. Create a script such as "kdialog --sorry 'shutting down'"
2. Add to Startup and shutdown kcm
3. Change "On Log in" to "On Log out"
4. Restart computer
Actual Results:  
Script is executed on logging in, and the setting has changed back to "On Log in"

Expected Results:  
The script is executed when logging out