Just to confirm that I am also having problems with connecting to hidden wireless networks on 9.10, using a netgear MA111 usb wireless adapter.
Strangely I can connect to my hidden network by creating a new connection (inputting the SSID and passphrase through network manager) but once I disconnect the only way I can re-connect is to restart the machine and create a new network (the one I created earlier just has a greyed connection button as others have described)
Unfortunately my router is supplied by my ISP who have modified it so I can't unhide the SSID
Just to confirm that I am also having problems with connecting to hidden wireless networks on 9.10, using a netgear MA111 usb wireless adapter.
Strangely I can connect to my hidden network by creating a new connection (inputting the SSID and passphrase through network manager) but once I disconnect the only way I can re-connect is to restart the machine and create a new network (the one I created earlier just has a greyed connection button as others have described)
Unfortunately my router is supplied by my ISP who have modified it so I can't unhide the SSID
Craig