In my case (WPA enterprise with TTLS) the password is remembered independently of the "available to all users" option. The problem is that since oneiric it is stored in /etc/NetworkManager as plaintext and not in the keyring.
In my case (WPA enterprise with TTLS) the password is remembered independently of the "available to all users" option. The problem is that since oneiric it is stored in /etc/NetworkManager as plaintext and not in the keyring.