Description of problem:
On my Thinkpad x60s, syslog is full of:

Apr 21 21:56:02 x60s kernel: [48875.909885] iwl3945 0000:03:00.0: Microcode SW error detected. Restarting 0x820
00008.
Apr 21 21:56:02 x60s kernel: [48875.909894] iwl3945 0000:03:00.0: Loaded firmware version: 15.32.2.9
Apr 21 21:56:02 x60s kernel: [48875.909931] iwl3945 0000:03:00.0: Start IWL Error Log Dump:
Apr 21 21:56:02 x60s kernel: [48875.909937] iwl3945 0000:03:00.0: Status: 0x0002A2E4, count: 1
Apr 21 21:56:02 x60s kernel: [48875.909943] iwl3945 0000:03:00.0: Desc       Time       asrtPC  blink2 ilink1  
nmiPC   Line
Apr 21 21:56:02 x60s kernel: [48875.910204] iwl3945 0000:03:00.0: SYSASSERT     (0x5) 3261490446 0x008B6 0x1375
6 0x00320 0x00000 764
Apr 21 21:56:02 x60s kernel: [48875.910208] 
Apr 21 21:56:02 x60s kernel: [48875.910340] iwl3945 0000:03:00.0: Start IWL Event Log Dump: display last 20 cou
nt
Apr 21 21:56:02 x60s kernel: [48875.910384] iwl3945 0000:03:00.0: 3261489461    0x00000000      1106
Apr 21 21:56:02 x60s kernel: [48875.910411] iwl3945 0000:03:00.0: 3261489465    0x00000001      1106
Apr 21 21:56:02 x60s kernel: [48875.910437] iwl3945 0000:03:00.0: 3261489466    0x0000000f      1106
Apr 21 21:56:02 x60s kernel: [48875.910463] iwl3945 0000:03:00.0: 3261489468    0x000003e5      1105
Apr 21 21:56:02 x60s kernel: [48875.910489] iwl3945 0000:03:00.0: 3261489471    0x0000041e      1115
Apr 21 21:56:02 x60s kernel: [48875.910515] iwl3945 0000:03:00.0: 3261489475    0x00000006      0463
Apr 21 21:56:02 x60s kernel: [48875.910541] iwl3945 0000:03:00.0: 3261489476    0x00000006      0462
Apr 21 21:56:02 x60s kernel: [48875.910567] iwl3945 0000:03:00.0: 3261489511    0x00000000      0201
Apr 21 21:56:02 x60s kernel: [48875.910593] iwl3945 0000:03:00.0: 3261489521    0x0000001c      0206
Apr 21 21:56:02 x60s kernel: [48875.910619] iwl3945 0000:03:00.0: 3261489523    0x00400001      0204
Apr 21 21:56:02 x60s kernel: [48875.910645] iwl3945 0000:03:00.0: 3261489528    0x00400001      0219
Apr 21 21:56:02 x60s kernel: [48875.910672] iwl3945 0000:03:00.0: 3261489529    0x00020041      0211
Apr 21 21:56:02 x60s kernel: [48875.910698] iwl3945 0000:03:00.0: 3261489534    0x00000000      0212
Apr 21 21:56:02 x60s kernel: [48875.910723] iwl3945 0000:03:00.0: 3261489865    0x00000000      0215
Apr 21 21:56:02 x60s kernel: [48875.910749] iwl3945 0000:03:00.0: 3261489939    0x00400008      0220
Apr 21 21:56:02 x60s kernel: [48875.910776] iwl3945 0000:03:00.0: 3261489956    0x00000000      0301
Apr 21 21:56:02 x60s kernel: [48875.910802] iwl3945 0000:03:00.0: 3261490223    0x000000d4      0303
Apr 21 21:56:02 x60s kernel: [48875.910828] iwl3945 0000:03:00.0: 3261490397    0x44520080      0401
Apr 21 21:56:02 x60s kernel: [48875.910840] iwl3945 0000:03:00.0: 3261490412    0x00000016      0452
Apr 21 21:56:02 x60s kernel: [48875.910840] iwl3945 0000:03:00.0: 3261490447    0x00000100      0125
Apr 21 21:56:02 x60s kernel: [48875.910840] iwl3945 0000:03:00.0: Error Reply type 0x000002FC cmd REPLY_SCAN_CMD (0x80) seq 0x4452 ser 0x00340000
Apr 21 21:56:02 x60s kernel: [48875.910840] iwl3945 0000:03:00.0: Command REPLY_SCAN_CMD failed: FW Error
Apr 21 21:56:02 x60s kernel: [48875.915352] iwl3945 0000:03:00.0: Can't stop Rx DMA.

This repeats exactly every 120 seconds.

Other than having an extremely full syslog, there is no immediately obvious impact on functionality or performance.

lspci says:
03:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)

Version-Release number of selected component (if applicable):
kernel-PAE-2.6.38.2-9.fc15.i686

How reproducible:
Always

Steps to Reproduce:
1. Boot
2. Connect to wireless