Odd... I posted a reply to this and it seems to have gone...
This is not a bug. Camerapick picks using camera coordinates NOT mouse coords, so Camerapick(camera,0,0) actually picks at the top left of the cameras viewport. :)
This is not a bug. Camerapick picks using camera coordinates NOT mouse coords, so Camerapick(camera,0,0) actually picks at the top left of the cameras viewport. :)