Yes, when I go back to old lib files it normal again.
However, I do restart my phone when revert back to old lib (I didn't restart my phone when applying your lib files).
Maybe later, I will try your lib files and restart my phone, and see if it make any difference.

---edit---
I try to install the new lib files again and reboot the phone, but I still encounter the same result: screen brightness set to the max and lock switch not functioning. I even try power off my phone, pull out the battery and power on again, but it makes no difference.
No body else encounter similar problem? Only me?

I also found something weird.
When I using your new lib files, I lost my internet connection (as in the Internet connection applet show nothing when I pressed it).
When I revert to the old lib files, it come back again. I don't even need to restart my phone.