Adding some additional info...
This bug is making wireless completely unusable on my laptop. It drops out every 10 minute or often times more frequent., I have to enable the kill switch, wait 5 seconds... most often this doesn't work and I have to repeate the procedure 2-3 times.
It doesn't seem like there has been any more discussions on the linux kernel list ( http://lkml.org/lkml/2008/12/10/143 ), and in .30 it even seems that iwlagn completely stopped working ( http://lkml.org/lkml/2009/4/26/239 ).
Is there any chance of a backport of older kernels' iwlagn driver, where it seems to work better? 8.10 was fine for me.

[23428.560028] iwlagn: index 0 not used in uCode key table.
[23443.867246] iwlagn: Read index for DMA queue txq_id (2) index 165 is out of range [0-256] 188 185
[23449.181688] iwlagn: Error sending REPLY_SCAN_CMD: time out after 500ms.
[23449.680528] iwlagn: Error sending REPLY_RXON: time out after 500ms.
[23449.680534] iwlagn: Error setting new RXON (-110)
[23450.180541] iwlagn: Error sending REPLY_RXON: time out after 500ms.
[23450.180546] iwlagn: Error setting new RXON (-110)
[23450.680517] iwlagn: Error sending REPLY_RXON: time out after 500ms.
[23450.680522] iwlagn: Error setting new RXON (-110)
[23459.680525] iwlagn: Error sending REPLY_SCAN_CMD: time out after 500ms.
[23460.180042] iwlagn: Error sending REPLY_RXON: time out after 500ms.
[23460.180046] iwlagn: Error setting new RXON (-110)
[23464.984310] iwlagn: Error sending REPLY_RXON: time out after 500ms.
[23464.984315] iwlagn: Error setting new RXON (-110)
[23465.491161] iwlagn: Error sending REPLY_SCAN_CMD: time out after 500ms.
[23465.988518] iwlagn: Error sending REPLY_RXON: time out after 500ms.
[23465.988523] iwlagn: Error setting new RXON (-110)
[23466.488527] iwlagn: Error sending REPLY_SCAN_CMD: time out after 500ms.
[23466.988716] iwlagn: Error sending REPLY_RXON: time out after 500ms.
[23466.988721] iwlagn: Error setting new RXON (-110)
[23470.992557] iwlagn: Error sending REPLY_SCAN_CMD: time out after 500ms.
[23471.499935] iwlagn: Error sending REPLY_RXON: time out after 500ms.
[23471.499944] iwlagn: Error setting new RXON (-110)
[23476.492558] iwlagn: Error sending REPLY_SCAN_CMD: time out after 500ms.
[23476.992531] iwlagn: Error sending REPLY_RXON: time out after 500ms.
[23476.992541] iwlagn: Error setting new RXON (-110)
[23481.992037] iwlagn: Error sending REPLY_SCAN_CMD: time out after 500ms.
[23481.992067] iwlagn: No space for Tx
[23481.992072] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23481.992077] iwlagn: Error setting new RXON (-28)
[23481.992087] iwlagn: No space for Tx
[23481.992092] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23486.993386] iwlagn: No space for Tx
[23486.993397] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23486.993416] iwlagn: No space for Tx
[23486.993421] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23486.993426] iwlagn: Error setting new RXON (-28)
[23486.993433] iwlagn: No space for Tx
[23486.993438] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23491.994775] iwlagn: No space for Tx
[23491.994786] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23491.994805] iwlagn: No space for Tx
[23491.994810] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23491.994815] iwlagn: Error setting new RXON (-28)
[23491.994823] iwlagn: No space for Tx
[23491.994828] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23496.996220] iwlagn: No space for Tx
[23496.996231] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23496.996251] iwlagn: No space for Tx
[23496.996256] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23496.996261] iwlagn: Error setting new RXON (-28)
[23496.996269] iwlagn: No space for Tx
[23496.996273] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23501.997415] iwlagn: No space for Tx
[23501.997426] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23501.997446] iwlagn: No space for Tx
[23501.997451] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23501.997456] iwlagn: Error setting new RXON (-28)
[23501.997464] iwlagn: No space for Tx
[23501.997468] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23503.760053] iwlagn: No space for Tx
[23503.760066] iwlagn: Error sending REPLY_STATISTICS_CMD: enqueue_hcmd failed: -28
[23506.998555] iwlagn: No space for Tx
[23506.998567] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23506.998588] iwlagn: No space for Tx
[23506.998593] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23506.998598] iwlagn: Error setting new RXON (-28)
[23506.998607] iwlagn: No space for Tx
[23506.998612] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23511.999736] iwlagn: No space for Tx
[23511.999747] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23511.999769] iwlagn: No space for Tx
[23511.999774] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23511.999778] iwlagn: Error setting new RXON (-28)
[23511.999786] iwlagn: No space for Tx
[23511.999791] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23517.000946] iwlagn: No space for Tx
[23517.000957] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23517.000979] iwlagn: No space for Tx
[23517.000984] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23517.000988] iwlagn: Error setting new RXON (-28)
[23517.000996] iwlagn: No space for Tx
[23517.001000] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23522.002119] iwlagn: No space for Tx
[23522.002130] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23522.002149] iwlagn: No space for Tx
[23522.002153] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23522.002158] iwlagn: Error setting new RXON (-28)
[23522.002165] iwlagn: No space for Tx
[23522.002170] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23530.085111] iwlagn: No space for Tx
[23530.085122] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23530.085142] iwlagn: No space for Tx
[23530.085147] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23530.085152] iwlagn: Error setting new RXON (-28)
[23530.085160] iwlagn: No space for Tx
[23530.085165] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23535.086560] iwlagn: No space for Tx
[23535.086571] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23535.086590] iwlagn: No space for Tx
[23535.086594] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23535.086599] iwlagn: Error setting new RXON (-28)
[23535.086607] iwlagn: No space for Tx
[23535.086611] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23540.087844] iwlagn: No space for Tx
[23540.087854] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23540.087876] iwlagn: No space for Tx
[23540.087880] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23540.087885] iwlagn: Error setting new RXON (-28)
[23540.087893] iwlagn: No space for Tx
[23540.087897] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23545.089159] iwlagn: No space for Tx
[23545.089169] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23545.089189] iwlagn: No space for Tx
[23545.089194] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23545.089198] iwlagn: Error setting new RXON (-28)
[23545.089206] iwlagn: No space for Tx
[23545.089211] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23550.090481] iwlagn: No space for Tx
[23550.090492] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23550.090511] iwlagn: No space for Tx
[23550.090516] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23550.090520] iwlagn: Error setting new RXON (-28)
[23550.090528] iwlagn: No space for Tx
[23550.090532] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23555.091765] iwlagn: No space for Tx
[23555.091776] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23555.091797] iwlagn: No space for Tx
[23555.091801] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23555.091806] iwlagn: Error setting new RXON (-28)
[23555.091814] iwlagn: No space for Tx
[23555.091818] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23560.093031] iwlagn: No space for Tx
[23560.093041] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23560.093061] iwlagn: No space for Tx
[23560.093066] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23560.093071] iwlagn: Error setting new RXON (-28)
[23560.093079] iwlagn: No space for Tx
[23560.093084] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23565.093485] iwlagn: No space for Tx
[23565.093495] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23565.093515] iwlagn: No space for Tx
[23565.093519] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23565.093524] iwlagn: Error setting new RXON (-28)
[23565.093532] iwlagn: No space for Tx
[23565.093536] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23570.094726] iwlagn: No space for Tx
[23570.094736] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23570.094755] iwlagn: No space for Tx
[23570.094760] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23570.094765] iwlagn: Error setting new RXON (-28)
[23570.094773] iwlagn: No space for Tx
[23570.094777] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23575.096197] iwlagn: No space for Tx
[23575.096209] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23575.096228] iwlagn: No space for Tx
[23575.096233] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23575.096238] iwlagn: Error setting new RXON (-28)
[23575.096246] iwlagn: No space for Tx
[23575.096251] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23580.099760] iwlagn: No space for Tx
[23580.099771] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23580.099790] iwlagn: No space for Tx
[23580.099795] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23580.099800] iwlagn: Error setting new RXON (-28)
[23580.099807] iwlagn: No space for Tx
[23580.099812] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23585.101280] iwlagn: No space for Tx
[23585.101291] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23585.101311] iwlagn: No space for Tx
[23585.101316] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23585.101321] iwlagn: Error setting new RXON (-28)
[23585.101328] iwlagn: No space for Tx
[23585.101333] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23590.102805] iwlagn: No space for Tx
[23590.102817] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23590.102837] iwlagn: No space for Tx
[23590.102841] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23590.102846] iwlagn: Error setting new RXON (-28)
[23590.102854] iwlagn: No space for Tx
[23590.102859] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23597.370603] iwlagn: No space for Tx
[23597.370615] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23597.370637] iwlagn: No space for Tx
[23597.370642] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23597.370647] iwlagn: Error setting new RXON (-28)
[23597.370655] iwlagn: No space for Tx
[23597.370660] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23602.372284] iwlagn: No space for Tx
[23602.372296] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23602.372316] iwlagn: No space for Tx
[23602.372321] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23602.372326] iwlagn: Error setting new RXON (-28)
[23602.372334] iwlagn: No space for Tx
[23602.372339] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23607.373265] iwlagn: No space for Tx
[23607.373277] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23607.373295] iwlagn: No space for Tx
[23607.373300] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23607.373305] iwlagn: Error setting new RXON (-28)
[23607.373313] iwlagn: No space for Tx
[23607.373318] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23612.409154] iwlagn: No space for Tx
[23612.409164] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23612.409187] iwlagn: No space for Tx
[23612.409192] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23612.409197] iwlagn: Error setting new RXON (-28)
[23612.409206] iwlagn: No space for Tx
[23612.409210] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23617.427507] iwlagn: No space for Tx
[23617.427519] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23617.427540] iwlagn: No space for Tx
[23617.427545] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23617.427550] iwlagn: Error setting new RXON (-28)
[23617.427558] iwlagn: No space for Tx
[23617.427563] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23622.428135] iwlagn: No space for Tx
[23622.428146] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23622.428168] iwlagn: No space for Tx
[23622.428173] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23622.428178] iwlagn: Error setting new RXON (-28)
[23622.428186] iwlagn: No space for Tx
[23622.428191] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23627.429962] iwlagn: No space for Tx
[23627.429973] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23627.429993] iwlagn: No space for Tx
[23627.429998] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23627.430003] iwlagn: Error setting new RXON (-28)
[23627.430011] iwlagn: No space for Tx
[23627.430016] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23632.431773] iwlagn: No space for Tx
[23632.431785] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23632.431805] iwlagn: No space for Tx
[23632.431809] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23632.431814] iwlagn: Error setting new RXON (-28)
[23632.431822] iwlagn: No space for Tx
[23632.431826] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23637.432629] iwlagn: No space for Tx
[23637.432640] iwlagn: Error sending REPLY_SCAN_CMD: enqueue_hcmd failed: -28
[23637.432660] iwlagn: No space for Tx
[23637.432664] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28
[23637.432669] iwlagn: Error setting new RXON (-28)
[23637.432677] iwlagn: No space for Tx
[23637.432682] iwlagn: Error sending REPLY_TX_POWER_DBM_CMD: enqueue_hcmd failed: -28
[23642.276041] iwlagn: No space for Tx
[23642.276052] iwlagn: Error sending REPLY_RXON: enqueue_hcmd failed: -28