Wireless-N connection drops with 2.6.32.26 kernel

I just ran update manager and it updated my kernel from 2.6.32-25 to 2.6.32-26 and now my wirless N connection at home drops randomly for minutes at a time. Rebooting, restarting networking, changing from dhcpclient to dhcpcd, and replacing network manager with wicd have made no difference. Machine comes up, sees network connects, then after a few minutes, drops connection. Sometimes it comes back, sometimes not. Either way, it doesn't stay up for long. I have looked at bug 548992 and while the behaviour is similar, for me, this ONLY happens if I boot the new -26 kernel.

I'm running Ubuntu 10.04 64 bit on a Toshiba T235D with an atheros AR9285 using the ath9k driver. My wireless router is a buffalo WZR-HP-G300NH running dd-wrt v24 SP2.

Using WPA1 or WPA2 both result in the same behaviour.

I will try this on 2.6.32.25 to double check that it doesn't have this issue, and that the problem is confined to 2.6.32.26

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-24-generic 2.6.32-24.43
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-24.43-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: SB [HDA ATI SB], device 0: ALC269 Analog [ALC269 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: smarlowe 2586 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xff700000 irq 16'
   Mixer name : 'Realtek ALC269'
   Components : 'HDA:10ec0269,1179fda4,00100100'
   Controls : 11
   Simple ctrls : 7
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xff410000 irq 19'
   Mixer name : 'ATI RS690/780 HDMI'
   Components : 'HDA:1002791a,00791a00,00100000'
   Controls : 4
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Sat Nov 27 20:48:52 2010
HibernationDevice: RESUME=UUID=7408e45c-ab31-4fee-8f06-e63fad045e56
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
Lsusb:
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 002: ID 04f2:b1d6 Chicony Electronics Co., Ltd
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: TOSHIBA Satellite T235D
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-generic root=UUID=535edf0a-0527-4d40-9491-30784e7499e8 ro quiet splash
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34.1
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
dmi.bios.date: 07/05/2010
dmi.bios.vendor: TOSHIBA
dmi.bios.version: 1.40
dmi.board.asset.tag: NULL
dmi.board.name: NDU11
dmi.board.vendor: TOSHIBA
dmi.board.version: 1.00
dmi.chassis.asset.tag: *
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnTOSHIBA:bvr1.40:bd07/05/2010:svnTOSHIBA:pnSatelliteT235D:pvrPST4LU-006009:rvnTOSHIBA:rnNDU11:rvr1.00:cvnTOSHIBA:ct10:cvrN/A:
dmi.product.name: Satellite T235D
dmi.product.version: PST4LU-006009
dmi.sys.vendor: TOSHIBA