Thinkpad L512 display doesn't reach full brightness

My 2 month old Thinkpad L512 display doesn't reach full brightness, except for a few seconds after bootup. Then it dims down to maybe 8 or so on a scale of 1-10. Which is often good indoors, but in a bright situation, I could use the extra screen brightness.
The screen correctly dims significantly (to maybe 2 or so on a scale of 1-10) after siting idle for a few minutes, as specified in the Power settings. But when it recovers, it is at full brightness for 10 seconds or so, then dims back down to 8 and stays there until I repeat the cycle.
I have poked around in the Display and Power settings, and the display is set to 100% there.
Any ideas? Thanks!
David

I had this problem with several of my machines. I noticed that if you unplugged the power and plugged it back in, the machine would jump back up to the brightest setting. But if you tried to adjust the brightness down and *then* back up, it would never reach the highest brightness.
I tried reinstalling the Power Management Driver and reinstalling Power Manager itself (both to no avail). I tried to downgrade to BIOS 1.20 but that didn't really have an effect either.
Finally, I downgraded to BIOS 1.19 and that resolved the issue. However, now I'm having an issue where the brightness changes two settings every time you hit the button (which was supposedly fixed in 1.20...though I had the same issue in 1.21).
I'm pretty frustrated with this machine. Hopefully the *next* BIOS resolves all of brightness related the issues...

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