Disable InCall proximity sensor?

[freeza]

It's quite annoying most of the time. Does anyone know what registry setting is used to control the InCall proximity sensor? I use a bluetooth headset and it's annoying to have my screen randomly shut off when i'm doing something on it because it thinks i'm putting it up to my face or the ambient light changes.

It also doesn't work well when having it in your pocket. I always pull my phone out to have the screen backlit the entire time.

Thanks in advance.