Is anyone still having this problem? I have just bought a used 2010 MacBook Air 13" and cannot connect it to my BT Home Hub 5 for more than a few seconds before it drops the connection. It seems to prefer BTWifi-with-FON which it always reverts to. Checking my Hub settings I have devices connected to both 2.4GHz and 5GHz so I'm quite sure what to do. Did any of the above fixes work for some people?