thinkpad_acpi: WARNING: Outdated ThinkPad BIOS/EC firmware

Hello
I am testing Ubuntu 11.04 Natty Narwall Desktop i386 in live session. (beta 1)

Hardware:
IBM Thinkpad T60 Laptop
Intel Core Duo
Intel GMA 950
2048 MB of RAM
250 GB of Hard Disk
This computer works flawlessly in Ubuntu 10.10

I have this bug only in this beta but not in previous alphas.
When I start a live session in this beta , some seconds after , the system asked a Bug report to submit.
And the error is: "thinkpad_acpi: WARNING: Outdated ThinkPad BIOS/EC firmware"

This bug don't crash the system.
Kernel: 2.6.38-7-generic

Thank you!

ProblemType: KernelOops
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-7-generic 2.6.38-7.39
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Annotation: Your system might become unstable now and might need to be restarted.
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xee240000 irq 46'
   Mixer name : 'Analog Devices AD1981'
   Components : 'HDA:11d41981,17aa2025,00100200'
   Controls : 20
   Simple ctrls : 11
Card29.Amixer.info:
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 79HT43WW-1.02'
   Mixer name : 'ThinkPad EC 79HT43WW-1.02'
   Components : ''
   Controls : 2
   Simple ctrls : 1
Card29.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
   Playback channels: Mono
   Limits: Playback 0 - 14
   Mono: Playback 4 [29%] [on]
Date: Sat Apr 2 05:51:14 2011
Failure: oops
LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
MachineType: LENOVO 1952W5R
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-7-generic N/A
 linux-backports-modules-2.6.38-7-generic N/A
 linux-firmware 1.49
SourcePackage: linux
Title: thinkpad_acpi: WARNING: Outdated ThinkPad BIOS/EC firmware
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/31/2006
dmi.bios.vendor: LENOVO
dmi.bios.version: 79ET58WW (1.04 )
dmi.board.name: 1952W5R
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr79ET58WW(1.04):bd03/31/2006:svnLENOVO:pn1952W5R:pvrThinkPadT60:rvnLENOVO:rn1952W5R:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 1952W5R
dmi.product.version: ThinkPad T60
dmi.sys.vendor: LENOVO