Thinkpad brightness on Windows 7 - still problematic

OK, so the other day I thought that I had "fixed" the LCD brightness issue on my Thinkpad X200 Tablet PC running Windows 7. Well, I was wrong. Keeping the Windows Mobility Center open seems to have helped, but it did not "fix" the problem. I wonder if the auto-dimming is causing some level of incompatibility. I'll have to continue my testing. In the meanwhile, I'm so much happier running Windows 7 over Vista that I'm willing to live with some inconsistent backlight issues on my Thinkpad.