After performing a clean installation of Windows 7 on my Lenovo ThinkPad X200 tablet PC, I noticed that the buttons on the screen bezel were not working. I have a few buttons that open menus, rotate screens, etc. They simply weren't doing anything.
So, I did some searching on Google and I found that Lenovo has a website where they list beta drivers for Windows 7. I installed the beta driver for the "Tablet Button Driver X200 Tablet" and my buttons started to work again!
If you're running Windows 7 on a Lenovo ThinkPad and you're experiencing any strange problems, you may want to see if Lenovo has a beta driver that could solve your problem. To view those Lenovo beta drivers, click here: