Assume you have typed in a wrong password for a given Wlan connection. When trying to connect a popup asks you for another one. Typing in a wrong password again does not yield further prompts. A click on "Connect" in the applet is ignored. Not even after reboot a prompts is shown again. Instead the error message "No secrets were provided" and "Connection 'XXX' deactivated" appears after boot and clicking on "Connect" is ignored. One has to go into "Wi-Fi Security" tab of the KCM and change the Password there. Afterwards the "Connect" button reacts again.
*** This bug has been marked as a duplicate of bug 377473 ***
*** This bug has been marked as a duplicate of bug 387502 ***