Version:           0.9 (using KDE 4.6.2) 
OS:                Linux

When creating a new netowrk connection or editing an existing one, the "system connection" check box is always disabled.
Thus, there's no way to create a system wide connection (that is a connection which is available before a user logs in).
The GNOME and XFCE conterpart (networkmanager front-end) work flawlessly, so this is no a back-end issue.

Reproducible: Always

Steps to Reproduce:
Try to create a new system connection either wider or wireless or whatever else you want.

Actual Results:  
The "system connection" check box is disabled.

Expected Results:  
The "system connection" check box is enabled to allow system wide connections.