I m install network-manager-gnome - not connect nosecurity network 
kill knetworkmanager 
start nm-applet 
not connected 
probably bug network-manager or wpa-supplicant?

Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  Activation (wlan0) starting connection 'Auto Bar 'NIL''
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  (wlan0): device state change: 3 -> 4 (reason 0)
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  (wlan0): device state change: 4 -> 5 (reason 0)
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  Activation (wlan0/wireless): connection 'Auto Bar 'NIL'' requires no security.  No secrets needed.
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  Config: added 'ssid' value 'Bar 'NIL''
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  Config: added 'scan_ssid' value '1'
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  Config: added 'key_mgmt' value 'NONE'
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  Config: set interface ap_scan to 1
Oct  4 18:01:52 dyug-nb2 NetworkManager: <info>  (wlan0): supplicant connection state:  inactive -> scanning
Oct  4 18:01:53 dyug-nb2 wpa_supplicant[1223]: CTRL-EVENT-SCAN-RESULTS
Oct  4 18:01:53 dyug-nb2 wpa_supplicant[1223]: Trying to associate with 00:1d:7e:ed:06:17 (SSID='Bar 'NIL'' freq=2462 MHz)
Oct  4 18:01:53 dyug-nb2 NetworkManager: <info>  (wlan0): supplicant connection state:  scanning -> associating
Oct  4 18:01:53 dyug-nb2 wpa_supplicant[1223]: Association request to the driver failed
Oct  4 18:01:54 dyug-nb2 wpa_supplicant[1223]: CTRL-EVENT-SCAN-RESULTS
Oct  4 18:01:56 dyug-nb2 wpa_supplicant[1223]: CTRL-EVENT-SCAN-RESULTS
Oct  4 18:01:58 dyug-nb2 wpa_supplicant[1223]: Authentication with 00:1d:7e:ed:06:17 timed out.
Oct  4 18:01:58 dyug-nb2 NetworkManager: <info>  (wlan0): supplicant connection state:  associating -> disconnected
Oct  4 18:01:58 dyug-nb2 NetworkManager: <info>  (wlan0): supplicant connection state:  disconnected -> scanning
Oct  4 18:02:00 dyug-nb2 wpa_supplicant[1223]: CTRL-EVENT-SCAN-RESULTS
Oct  4 18:02:00 dyug-nb2 wpa_supplicant[1223]: Trying to associate with 00:1d:7e:ed:06:17 (SSID='Bar 'NIL'' freq=2462 MHz)
Oct  4 18:02:00 dyug-nb2 wpa_supplicant[1223]: Association request to the driver failed
Oct  4 18:02:00 dyug-nb2 NetworkManager: <info>  (wlan0): supplicant connection state:  scanning -> associating
Oct  4 18:02:00 dyug-nb2 wpa_supplicant[1223]: CTRL-EVENT-SCAN-RESULTS
Oct  4 18:02:04 dyug-nb2 wpa_supplicant[1223]: CTRL-EVENT-SCAN-RESULTS
Oct  4 18:02:05 dyug-nb2 wpa_supplicant[1223]: Authentication with 00:1d:7e:ed:06:17 timed out.
Oct  4 18:02:05 dyug-nb2 NetworkManager: <info>  (wlan0): supplicant connection state:  associating -> disconnected
Oct  4 18:02:05 dyug-nb2 NetworkManager: <info>  (wlan0): supplicant connection state:  disconnected -> scanning
Oct  4 18:02:06 dyug-nb2 wpa_supplicant[1223]: CTRL-EVENT-SCAN-RESULTS

I think the problem is not in knetworkmanager 

I think the problem is wpa_supplicant 

Sorry my very bad english