in pocket detection & other sensor issues

Hey gang,
I'm on a stock D2G & while this isn't a major issue, I find it curious at least.
When I got the phone, I noticed that the in pocket detection sensor didn't work. I checked it off in the settings and stopped worrying about it. Then the other day I turned it on and it was working for about a day or two, but now isn't working again.


I could probably start another thread on this, but the camera's face detection doesn't seem to work either....

And - when the phone is lying flat, it's default orientation is upside-down landscape, is there a way to calibrate the accelerometer?

thanks for the input on any of these issues.
T