After the upgrade to Ubuntu 13.10, I was able to connect to my home wifi, but not my office one. I realised Ubuntu has issue is with only “WPA & WPA 2 Enterprise” type authentication. On Googling, I came across this stackoverflow post to be closely relevant. However, I fixed the following way. Delete the faulty connection from list in Network Connections.
$ locate MyWifiName /etc/NetworkManager/system-connections/MyWifiName
Open the above file as a root user and remove the below line and retry connecting. It works!
and you’re welcome 🙂