The latest version I've tried that works fine is Linus' 2.6.31-rc3
with the latest commit being:

commit 35b5c55fee08e6e4001ba98060a2d0b82f70b5f4
Merge: e9e961c... b2dde6a...
Author: Linus Torvalds [off-list ref]
Date:   Wed Jul 15 10:29:09 2009 -0700

I encountered the problem I described when I booted:

2.6.31-rc3-next-20090716

-n

----- Original Message -----
From: "John W. Linville" <redacted>
To: "Stephen Rothwell" <redacted>
Cc: "Noah Watkins" <redacted>, linux-next@vger.kernel.org, "LKML" <redacted>, netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>
Sent: Monday, July 20, 2009 7:59:34 AM GMT -08:00 US/Canada Pacific
Subject: Re: regression: wireless authentication

On Fri, Jul 17, 2009 at 02:10:47PM +1000, Stephen Rothwell wrote:

Hi Noah,

Lets cc some people who may be able to help ...

On Thu, 16 Jul 2009 20:57:06 -0700 Noah Watkins [off-list ref] wrote:

quoted

With 2.6.31-rc3-next-20090716 all wireless access points are detected, but
authentication fails. I haven't verified on an access point w/o WPA.

2.6.31-rc3 functions fine. I haven't been able to complete a bisect yet.

05:01.0 Network controller: Atheros Communications Inc. AR5008 Wireless Network
Adapter (rev 01)

Odd...have you (i.e. Noah) been using -next trees all along?  What was
the last previous one that worked?  I didn't push anything out for
-next to pick-up all last week...

John
-- 
John W. Linville		Someday the world will need a hero, and you
linville@tuxdriver.com			might be all we have.  Be ready.
			¡Viva Honduras Libre!