I got the same problem under atheros card - when I'm turning off essid broadcasting in Acess Point Network Manager can't connect.
But when I run while NetworkManager is trying to connect:
<code> sudo ifdown ath0; sudo ifup ath0</code>
it's getting connected.
It's the same issue as https:/ /bugs.launchpad .net/network- manager/ +bug/89493
The problem occurs on different wireless cards, so I don't think problem is on wireless drivers side.
I got the same problem under atheros card - when I'm turning off essid broadcasting in Acess Point Network Manager can't connect.
But when I run while NetworkManager is trying to connect:
<code> sudo ifdown ath0; sudo ifup ath0</code>
it's getting connected.
There wasn't such problem in Edgy.