Here is dmesg wlan0 activity from boot until wireless connection failed:

[   25.879332] b43-phy0: Loading firmware version 410.2160 (2007-05-26 15:32:10)
[   25.930058] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   26.755458] ADDRCONF(NETDEV_UP): eth0: link is not ready
[   26.812082] intel8x0_measure_ac97_clock: measured 55706 usecs (2684 samples)
[   26.812088] intel8x0: clocking to 48000
[   28.519904] psmouse serio2: ID: 10 00 64
[   29.263490] EXT4-fs (sda6): re-mounted. Opts: errors=remount-ro,commit=0
[   29.271976] EXT4-fs (sda7): re-mounted. Opts: commit=0
[   31.103567] input: PS/2 Generic Mouse as /devices/platform/i8042/serio1/serio2/input/input8
[   31.439189] EXT4-fs (sda6): re-mounted. Opts: errors=remount-ro,commit=0
[   31.457346] EXT4-fs (sda7): re-mounted. Opts: commit=0
[   44.025551] wlan0: authenticate with 00:1f:b3:68:66:a1 (try 1)
[   44.027724] wlan0: authenticated
[   44.028116] wlan0: associate with 00:1f:b3:68:66:a1 (try 1)
[   44.029798] wlan0: RX AssocResp from 00:1f:b3:68:66:a1 (capab=0x431 status=0 aid=1)
[   44.029803] wlan0: associated
[   44.030841] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   44.030996] cfg80211: Calling CRDA for country: US
[   44.084644] cfg80211: Received country IE:
[   44.084653] cfg80211: Regulatory domain: US
[   44.084655]     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[   44.084660]     (2402000 KHz - 2472000 KHz @ 40000 KHz), (10000 mBi, 2700 mBm)
[   44.084663] cfg80211: CRDA thinks this should applied:
[   44.084665] cfg80211: Regulatory domain: US
[   44.084668]     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[   44.084672]     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[   44.084676]     (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
[   44.084680]     (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[   44.084684]     (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[   44.084688]     (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[   44.084692]     (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
[   44.084695] cfg80211: We intersect both of these and get:
[   44.084698] cfg80211: Regulatory domain: 98
[   44.084700]     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[   44.084704]     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[   44.084712] cfg80211: Disabling channel 2467 MHz on phy0 due to Country IE
[   44.084715] cfg80211: Disabling channel 2472 MHz on phy0 due to Country IE
[   44.084718] cfg80211: Disabling channel 2484 MHz on phy0 due to Country IE
[   44.084723] cfg80211: Current regulatory domain updated by AP to: US
[   44.084726]     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[   44.084730]     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[   44.213399] padlock: VIA PadLock not detected.
[   54.640033] wlan0: no IPv6 routers present
[  795.504071] No probe response from AP 00:1f:b3:68:66:a1 after 500ms, disconnecting.
[  795.505356] cfg80211: All devices are disconnected, going to restore regulatory settings
[  795.505367] cfg80211: Restoring regulatory settings
[  795.505376] cfg80211: Calling CRDA to update world regulatory domain
[  795.517166] cfg80211: World regulatory domain updated:
[  795.517172]     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[  795.517176]     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  795.517181]     (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  795.517185]     (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  795.517189]     (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  795.517193]     (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)