Has anyone noticed if their iPad changes brightness depending on lighting conditions? Mine does not change at all. From a bright room to completely dark, my MBP will change to lowest brightness setting but my iPad still stays bright as #@%! Anyone know where the sensor is so I can make sure mine isn't broken? Oh and is anyone annoyed at the lowest brightness setting? Using an iPad at 2AM in the morning with no lights on is a pain due to the minimum brightness being too bright.