Comment 3 for bug 1187483

I found a workaround for my network, also working for eduroam.
Here illustrated with eduroam.

1) configure your network properly with the network manager, it will fail to authenticate

2) run the following in order to edit as root
        sudo gedit /etc/NetworkManager/system-connections/eduroam
       (replace eduroam by your network)

3) in the editor replace "system-ca-certs=true" by "system-ca-certs=false" (or even just remove the line)

4) reconnect using the network manager, and it should work

I hope this helps.