Same problem on IBM Thinkpad T42 with USB wifi stick.
Ubuntu 9.04 worked without a problem. Automatic worked after some time, so usually I enabled it manually to speed it up.
in Ubuntu 9.10 if I manually try to enable the network with the hidden SSID the connect button is greyed out. After a few minutes networkmanager detects the network availability and connects, but those few minutes are very annoying.
Same problem on IBM Thinkpad T42 with USB wifi stick.
Ubuntu 9.04 worked without a problem. Automatic worked after some time, so usually I enabled it manually to speed it up.
in Ubuntu 9.10 if I manually try to enable the network with the hidden SSID the connect button is greyed out. After a few minutes networkmanager detects the network availability and connects, but those few minutes are very annoying.