Summary:
DUT still sends OPEN-NONE ad-hoc beacons after changed from OPEN-NONE security 
to OPEN-WEP 64bit.
Environmet:

OS Version is SUSE10 with 2.6.15.3 kernel, Wireless Tools(Rev. 28 pre13)

Failure Rate:	100% 3/3

Steps to Reproduce	
1. Load wireless driver module.
2. On DUT, use the command: iwconfig eth1 essid AD mode ad-hoc channel 1 to 
create ad-hoc network.
3. Check DUT create ad-hoc network successfully.
eth1      IEEE 802.11g  ESSID:"AD"
          Mode:Ad-Hoc  Frequency:2.412 GHz  Cell: 02:13:02:41:46:32
          Bit Rate=1 Mb/s   Tx-Power:15 dBm
          Retry limit:15   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality:60  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:16   Missed beacon:0
4. On partner system(an Windows XP), the SSID with OPEN-NONE security shows.
 
5. Change the adhoc security to OPEN-WEP 64 bit on DUT with iwconfig eth1 key 
0123456789, then check the information as following:
 eth1      IEEE 802.11g  ESSID:"AD"
          Mode:Ad-Hoc  Frequency:2.412 GHz  Cell: 02:13:02:41:46:32
          Bit Rate=1 Mb/s   Tx-Power:15 dBm
          Retry limit:15   RTS thr:off   Fragment thr:off
          Encryption key:0123-4567-89   Security mode:open
          Power Management:off
          Link Quality:60  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:637   Missed beacon:0
6. Scan the SSID on partner system, the SSID still shows OPEN-NONE security.

Verification	
1. This problem is also observed on OPEN-WEP 128bit.
2. This problem is NOT observed after changed the channel on DUT. 
3. This problem is NOT observed after changed the band on DUT.
4. This problem is NOT observed on create the ad-hoc directly on DUT with the 
command iwconfig eth1 essid AD mode ad-hoc channel 1 key 0123456789.

Comments	
Sniffer file attached. DUT MAC 00:13:02:00:C3:29.