My Wifi on my new Thinkpad W520 running Natty keeps dropping out and coming back on. Output from dmesg below. Any advice?

[30493.687552] wlan0: authenticate with e0:91:f5:ef:7b:b2 (try 1)

[30493.689127] wlan0: authenticated

[30493.689144] wlan0: associate with e0:91:f5:ef:7b:b2 (try 1)

[30493.693592] wlan0: RX AssocResp from e0:91:f5:ef:7b:b2 (capab=0x411 status=0 aid=4)

[30493.693595] wlan0: associated

[31631.172868] wlan0: deauthenticated from e0:91:f5:ef:7b:b2 (Reason: 7)

[31631.211847] cfg80211: All devices are disconnected, going to restore regulatory settings

[31631.211868] cfg80211: Restoring regulatory settings

[31631.211873] cfg80211: Calling CRDA to update world regulatory domain

[31631.215037] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain

[31631.215042] cfg80211: World regulatory domain updated:

[31631.215044] cfg80211:     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)

[31631.215046] cfg80211:     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)

[31631.215049] cfg80211:     (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)

[31631.215051] cfg80211:     (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)

[31631.215053] cfg80211:     (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)

[31631.215055] cfg80211:     (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)

[31632.289638] wlan0: authenticate with e0:91:f5:ef:7b:b2 (try 1)

[31632.291262] wlan0: authenticated

[31632.291276] wlan0: associate with e0:91:f5:ef:7b:b2 (try 1)

[31632.295119] wlan0: RX AssocResp from e0:91:f5:ef:7b:b2 (capab=0x411 status=0 aid=4)

[31632.295123] wlan0: associated

[31886.234836] wlan0: deauthenticated from e0:91:f5:ef:7b:b2 (Reason: 7)

[31886.306735] cfg80211: All devices are disconnected, going to restore regulatory settings

[31886.306740] cfg80211: Restoring regulatory settings

[31886.306744] cfg80211: Calling CRDA to update world regulatory domain