I've noticed at night, the theme will switch from the normal bright and blue theme to the darkside theme when on 'Auto'. I like this, I think it is awesome! My biggest issue with it however is that it takes a considerable amount of time for it to do this, I'd say about 3 seconds or so after the page viewable. This is rather disorienting to my eyes to go from a very bright screen to a very dark one like that at night.
Would love to see this fixed whenever someone has the chance. If it helps, I run Windows 8.1 Update 1 64-bit with IE11.