I have been having problems with the light sensor since upgrading the GB nightly build to 0.7 (maybe it was also a problem in 0.6 and I just didn't notice).
I use a tasker profile to automatically set the screen brightness to "auto" when the light sensor reads 75-100%, and to the lowest when the light sensor reads below 75%. But tasker won't seem to switch anymore.
I tried installing "androsensor" and it seems that the light sensor reads only 10 lux (the minimum) and never gets any higher.
I cleared data and cache during 0.8.
Did my light sensor break, or is this a liberty beta/gingerbread problem?