Comment 3 for bug 59159

I've the same problem but I know that this happened after a connection was established. Netapplet let me set up the key and save it. It request a password for the "ring" which I don't know what is do with it.

After that a have in /etc/network/interfaces

iface eth1 inet dhcp
wireless-essid paco
wireless-key ???????????

I'm able to scan manually using wpa_supplicant, I don't know if network-manager use it

Does exist a method to remove all wireless configuration and start again? This is the 2nd time I get this error, the first one it was solved removing all userś configuration files but it does not work again :(