F8: Broadcom 4311 won't connect; deauthentication reason=7 ??

[sean darcy]

On Fedora 8 I'm having trouble getting my 4311 to connect to the access 
point. I've posted on the b43 list, but it may not be a driver problem, 
but someplace else in the driver stack.

uname -r
2.6.23.9-85.fc8

lspci -n
04:00.0 Network controller [0280]: Broadcom Corporation BCM94311MCG
wlan mini-PCI [14e4:4311] (rev 01)

cat /etc/sysconfig/network-scripts/ifcfg-wlan0
DEVICE=wlan0
BOOTPROTO=dhcp
ONBOOT=yes
TYPE=Wireless
ESSID=belkin

All the right kmods seem to be loaded:

lsmod | grep b43
b43                   133221  0
rfkill                  9297  2 b43
mac80211              115789  1 b43
input_polldev           7369  1 b43
ssb                    30149  1 b43

and the iw tools work OK:

iwconfig wlan0
wlan0     IEEE 802.11g  ESSID:"belkin"
          Mode:Managed  Frequency:2.412 GHz  Access Point: 00:11:50:22:95:52
          Bit Rate=1 Mb/s   Tx-Power=27 dBm
          Retry min limit:7   RTS thr:off   Fragment thr=2352 B
          Encryption key:off
          Link Quality=65/100  Signal level=-70 dBm  Noise level=-73 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

iwlist wlan0 scan
wlan0     Scan completed :
          Cell 01 - Address: 00:11:50:22:95:52
                    ESSID:"belkin"
                    Mode:Master
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=81/100  Signal level=-45 dBm  Noise 
level=-73 dBm
                    Encryption key:off
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:tsf=0000008d74d0946c
          Cell 02 - Address: 00:16:B6:2E:BA:B7
                    ESSID:"paulc"
                    Mode:Master
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=56/100  Signal level=-83 dBm  Noise 
level=-73 dBm
                    Encryption key:off
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
                              12 Mb/s; 48 Mb/s
                    Extra:tsf=00000089fb5f7939

but ifup wlan0 fails:

dmesg | grep wlan0
ADDRCONF(NETDEV_UP): wlan0: link is not ready
wlan0: Initial auth_alg=0
wlan0: authenticate with AP 00:11:50:22:95:52
wlan0: RX authentication from 00:11:50:22:95:52 (alg=0 transaction=2 
status=0)
wlan0: authenticated
wlan0: associate with AP 00:11:50:22:95:52
wlan0: RX AssocResp from 00:11:50:22:95:52 (capab=0x601 status=0 aid=2)
wlan0: associated
wlan0: switched to short barker preamble (BSSID=00:11:50:22:95:52)
wlan0: WMM queue=2 aci=0 acm=0 aifs=2 cWmin=15 cWmax=1023 burst=32
wlan0: WMM queue=3 aci=1 acm=0 aifs=7 cWmin=15 cWmax=1023 burst=0
wlan0: WMM queue=1 aci=2 acm=0 aifs=2 cWmin=7 cWmax=15 burst=64
wlan0: WMM queue=0 aci=3 acm=0 aifs=2 cWmin=3 cWmax=7 burst=32
ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan0: RX too short data frame payload
wlan0: RX too short data frame payload
wlan0: RX too short data frame payload
ADDRCONF(NETDEV_UP): wlan0: link is not ready
wlan0: switched to short barker preamble (BSSID=00:11:50:22:95:52)
wlan0: RX deauthentication from 00:11:50:22:95:52 (reason=7)
wlan0: deauthenticated

Thanks for any help

sean