hostapd v0.6.10 authentication problem

[James Burrows]

Sorry if this ends up a double post, but I hadn't subscribed when I sent it 
the first time.

I am using debian sid and the debian packaged kernel 2.6.34-1, hostapd
 v0.6.10 and compat-wireless-2.6.34 ath9k driver, which the syslog says is
 phy0: Atheros AR5416 MAC/BB Rev:2 AR2133 RF Rev:81

 hostapd outputs the following:-

 Configuration file: ./hostapd.conf
 Using interface wlan0 with hwaddr 94:0c:6d:c4:bc:ce and ssid 'BERNIE'
 Station c8:3a:35:c1:fe:c1 trying to deauthenticate, but it is not 
authenticated.
 Station c8:3a:35:c1:fe:c1 trying to deauthenticate, but it is not 
authenticated.
 wlan0: STA c8:3a:35:c1:fe:c1 IEEE 802.11: did not acknowledge 
authentication  response
 Station c8:3a:35:c1:fe:c1 trying to deauthenticate, but it is not 
authenticated.
 wlan0: STA c8:3a:35:c1:fe:c1 IEEE 802.11: did not acknowledge 
authentication  response
 over and over, etc.

 hostapd.conf contains the following:-

 interface=wlan0
 driver=nl80211
 ssid=BERNIE
 channel=1
 hw_mode=g
 wmm_enabled=1
 ieee80211n=1
 ht_capab=[HT40+][DSSS_CCK-40][SHORT-GI-40]
 macaddr_acl=0
 auth_algs=1
 ignore_broadcast_ssid=0
 wpa=3
 wpa_passphrase=password
 wpa_key_mgmt=WPA-PSK
 wpa_pairwise=TKIP
 rsn_pairwise=CCMP

 I am seeing 'BERNIE' as an access point, and the mouseover in Windows 7 
says  'radio type n'.

 However, if I set ieee80211n=0, the mouseover will say 'radio type g', and 
work perfectly, ie:-

 Configuration file: ./hostapd.conf
 Using interface wlan0 with hwaddr 94:0c:6d:c4:bc:ce and ssid 'BERNIE'
 wlan0: STA c8:3a:35:c1:fe:c1 IEEE 802.11: authenticated
 wlan0: STA c8:3a:35:c1:fe:c1 IEEE 802.11: associated (aid 1)
 wlan0: STA c8:3a:35:c1:fe:c1 RADIUS: starting accounting session
 4C1791FD-00000000
 wlan0: STA c8:3a:35:c1:fe:c1 WPA: pairwise key handshake completed (RSN)

 Is this a bug with hostapd, or the ath9k driver, or some oversight in the 
hostapd.conf file?