Gap above full screen slide on 1080p screen Supersized 3.1.3

[galaxy-nomad]

Hello,
My WordPress theme has Supersized 3.1.3 Built in. On 1080p screens there is a gap above the slide and below the top of the screen almost as if the image has been shifted down. When I view your demo on a 1080p screen it renders correctly with no gap. Is there a way that I can upgrade my gallery if the latest version fixes the gap issue?

[summerjob]

I have the same issue with fullscreen background slider in Safari OS X