Re: Camera appears black and white - any one experienced this ?
The camera detects scene light levels using a dedicated sensor. This sensor detects ambient light levels or light directly falling on the camera. You can see two different scenarios of this not working as you would expect.
Camera is in night mode yet it is day time (example in this post).
Light levels reaching the sensor fall below the level required for night mode activation. Night mode is activated and the camera removes the IR cut filter and switches to B&W.
Camera is in day move yet it is night time.
Light levels reaching the sensor are above the level required for night mode activation. This can happen when the camera is mounted very close to an outside light fitting. The light from the exterior light makes the camera believe the scene is bright enough when it is actually dark.
Adjusting the thresholds or manual fixing night mode transitions will fix both these scenarios.