b43-openfwwf - Frequent Disconnects on Broadcom BCM4311

I've installed the b43-openfwwf driver...
...and am being disconnected frequently:
Ideas what this world regulatory domain is all about? Suggestions how I can prevent this from happening?
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[eric@localhost ~]$ lspci | grep -i network
0c:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01)
[eric@localhost ~]$ rpm -qa | grep b43
b43-openfwwf-5.2-1.mga1
[eric@localhost ~]$ sudo iwconfig wlan0
[sudo] password for eric:
wlan0 IEEE 802.11bg ESSID:"attwifi"
Mode:Managed Frequency:2.412 GHz Access Point: 00:21:D8:36:14:E0
Bit Rate=54 Mb/s Tx-Power=27 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=65/70 Signal level=-45 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
...and am being disconnected frequently:
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Apr 30 12:42:02 localhost kernel: cfg80211: Calling CRDA to update world regulatory domain
Apr 30 12:42:02 localhost kernel: cfg80211: World regulatory domain updated:
Apr 30 12:42:02 localhost kernel: cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Apr 30 12:42:02 localhost kernel: cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:02 localhost kernel: cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:02 localhost kernel: cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:02 localhost kernel: cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:02 localhost kernel: cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:02 localhost kernel: cfg80211: Calling CRDA for country: US
Apr 30 12:42:02 localhost kernel: cfg80211: Regulatory domain changed to country: US
Apr 30 12:42:02 localhost kernel: cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Apr 30 12:42:02 localhost kernel: cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Apr 30 12:42:02 localhost kernel: cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
Apr 30 12:42:02 localhost kernel: cfg80211: (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:02 localhost kernel: cfg80211: (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:02 localhost kernel: cfg80211: (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:02 localhost kernel: cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
Apr 30 12:42:02 localhost ifplugd(wlan0)[9315]: Link beat lost.
Apr 30 12:42:04 localhost kernel: cfg80211: Calling CRDA to update world regulatory domain
Apr 30 12:42:04 localhost kernel: cfg80211: World regulatory domain updated:
Apr 30 12:42:04 localhost kernel: cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Apr 30 12:42:04 localhost kernel: cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:04 localhost kernel: cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:04 localhost kernel: cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:04 localhost kernel: cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:04 localhost kernel: cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:04 localhost kernel: cfg80211: Calling CRDA for country: US
Apr 30 12:42:04 localhost kernel: cfg80211: Regulatory domain changed to country: US
Apr 30 12:42:04 localhost kernel: cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Apr 30 12:42:04 localhost kernel: cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Apr 30 12:42:04 localhost kernel: cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
Apr 30 12:42:04 localhost kernel: cfg80211: (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:04 localhost kernel: cfg80211: (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:04 localhost kernel: cfg80211: (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Apr 30 12:42:04 localhost kernel: cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
Apr 30 12:42:09 localhost ifplugd(wlan0)[9315]: Executing '/etc/ifplugd/ifplugd.action wlan0 down'.
Apr 30 12:42:09 localhost avahi-daemon[2191]: Withdrawing address record for 192.168.5.179 on wlan0.
Apr 30 12:42:09 localhost avahi-daemon[2191]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.5.179.
Apr 30 12:42:09 localhost avahi-daemon[2191]: Interface wlan0.IPv4 no longer relevant for mDNS.
Apr 30 12:42:09 localhost avahi-daemon[2191]: Withdrawing address record for fe80::21e:8cff:fe92:26b0 on wlan0.
Apr 30 12:42:09 localhost vnstatd[3129]: SIGHUP received, flushing data to disk and reloading config.
Apr 30 12:42:09 localhost ifplugd(wlan0)[9315]: client: Reloading vnstatd configuration: [ OK ]#015
Apr 30 12:42:09 localhost ifplugd(wlan0)[9315]: Program executed successfully.
Apr 30 12:42:09 localhost kernel: b43-phy0: Loading OpenSource firmware version 410.31754
Apr 30 12:42:09 localhost kernel: b43-phy0: Hardware crypto acceleration not supported by firmware
Apr 30 12:42:09 localhost kernel: b43-phy0: QoS not supported by firmware
Apr 30 12:42:09 localhost kernel: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Apr 30 12:42:09 localhost kernel: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Apr 30 12:42:10 localhost mgaapplet[2362]: Checking Network: seems disabled
Apr 30 12:42:10 localhost ntpd[2499]: Deleting interface #16 wlan0, 192.168.5.179#123, interface stats: received=8, sent=9, dropped=0, active_time=156 secs
Apr 30 12:42:10 localhost ntpd[2499]: 205.233.73.201 interface 192.168.5.179 -> (none)
Apr 30 12:42:10 localhost ntpd[2499]: 69.50.219.51 interface 192.168.5.179 -> (none)
Apr 30 12:42:10 localhost ntpd[2499]: 66.43.128.50 interface 192.168.5.179 -> (none)
Apr 30 12:42:10 localhost ntpd[2499]: Deleting interface #15 wlan0, fe80::21e:8cff:fe92:26b0#123, interface stats: received=0, sent=0, dropped=0, active_time=158 secs
Apr 30 12:42:10 localhost ntpd[2499]: peers refreshed
Apr 30 12:42:10 localhost ifplugd(wlan0)[9315]: Link beat detected.
Apr 30 12:42:11 localhost avahi-daemon[2191]: Registering new address record for fe80::21e:8cff:fe92:26b0 on wlan0.*.
Apr 30 12:42:11 localhost ifplugd(wlan0)[9315]: Executing '/etc/ifplugd/ifplugd.action wlan0 up'.
Apr 30 12:42:12 localhost ntpd[2499]: Listen normally on 17 wlan0 fe80::21e:8cff:fe92:26b0 UDP 123
Apr 30 12:42:12 localhost ntpd[2499]: peers refreshed
Apr 30 12:42:12 localhost dhclient: DHCPREQUEST on wlan0 to 255.255.255.255 port 67
Apr 30 12:42:12 localhost dhclient: DHCPACK from 192.168.5.1
Apr 30 12:42:12 localhost avahi-daemon[2191]: Joining mDNS multicast group on interface wlan0.IPv4 with address 192.168.5.179.
Apr 30 12:42:12 localhost avahi-daemon[2191]: New relevant interface wlan0.IPv4 for mDNS.
Apr 30 12:42:12 localhost avahi-daemon[2191]: Registering new address record for 192.168.5.179 on wlan0.IPv4.
Apr 30 12:42:12 localhost NET[10321]: /sbin/dhclient-script : updated /etc/resolv.conf
Apr 30 12:42:12 localhost ifplugd(wlan0)[9315]: client: Determining IP information for wlan0.../etc/sysconfig/network-scripts/network-functions: line 419: /usr/sbin/nscd: No such file or directory
Apr 30 12:42:12 localhost dhclient: bound to 192.168.5.179 -- renewal in 1571 seconds.
Apr 30 12:42:12 localhost ifplugd(wlan0)[9315]: client: done.
Apr 30 12:42:12 localhost vnstatd[3129]: SIGHUP received, flushing data to disk and reloading config.
Apr 30 12:42:12 localhost ifplugd(wlan0)[9315]: client: Reloading vnstatd configuration: [ OK ]#015
Apr 30 12:42:12 localhost ifplugd(wlan0)[9315]: Program executed successfully.
Ideas what this world regulatory domain is all about? Suggestions how I can prevent this from happening?