Brightness control problem after returning from Stand By - T500

Hi,
I have a Lenovo ThinkPad T500 under Windows XP SP2.
In Power Manager, I have created a custom power management scheme and set the brightness to 80%. This works fine when I boot up the machine, but when I return from Stand By mode (sleep) the machine automatically sets the brightness to 100%. I will then have to use to brightness control buttons to set it back to 80%. This is very annoying and obviously a bug.
I have the latest BIOS and Power Manager version installed.
Can someone offer a solution please?

I found your post after searching as I hae the exact problem you describe - I turn off the screen using Fn F3 and later when I wake the display the brightness jumps to 100% and I cannot get it to turn down to any level. It's stuck at 100%. Yup, just tried closing-n-opening the lid the screen goes to my previously set brightness level.
my drivers are current as at 2010-03-26 (today)
Running a downgraded XP W500 model...
a bug for sure!
Rick
W500 4058-CTO WinXP

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