It's been sometime since Samsung tweaked up their Extra Settings app for their Focus S and Flash devices. The mini-app found under Settings controls the auto-display intensity, key vibration feedback and echo cancelation.
But what really matters is Extra Settings are thought to control how much the screen dims/adjusts to ambient light. In the past, this app has slowly fixed what many us have perceived as a "too dim of a screen" on the Focus S resulting in a much more responsive changing of screen brightness.
Of course like usual, version 1.7 does not come with a changelog so your guess is as good as ours. We could mention how our Focus S looks a little brighter now but honestly, that's not very scientific and we're prone to placebo effects at times. Hit us up in comments if you noticed any improvements. Thanks, Jarrod J., for the heads up