I think I'm having similar problem on a Toshiba laptop with Intel 2200 card 
since yesterday upgrade.
If I boot with the switch hardware card on, I can connect to the AP.
Turning it off during a gutsy session I get with dmesg:
 
[ 1778.508000] atkbd.c: Unknown key pressed (translated set 2, code 0x95 on 
isa0060/serio0).
[ 1778.508000] atkbd.c: Use 'setkeycodes e015 <keycode>' to make it known.

turning it on again I get:

[ 1791.848000] atkbd.c: Unknown key released (translated set 2, code 0x95 on 
isa0060/serio0).
[ 1791.848000] atkbd.c: Use 'setkeycodes e015 <keycode>' to make it known.
[ 1793.804000] ipw2200: Failed to send CARD_DISABLE: Command timed out.

and now on I cannot connect to internet neither ping the AP.
The strange thing is that with iwconfig the card seems to be connected to the 
AP (I see it's MAC address)

-- 
Acer laptop & ipw2200: Recent upgrade breaks radio kill-switch
https://bugs.launchpad.net/bugs/145290
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