Two Suggestions

Zandrae

I just installed the new version of f.lux and it's lovely once I got it to stop overriding my mouse again.

I had two suggestions, however, that would make things wonderful.

Let us save our custom settings--This will let us save time and go between one or more profiles we like to use.
Give us a change color tint as you darken the screen optional checkbox in a setting somewhere and dropdown menu where if checked, (or a slider) where you select a color that applies as you use the alt page down darken feature. (Right now it feels like as you darken the screen it seems to lose its nice warm hue. It probably doesn't actually but it feels like it does.)

That being said, thanks for the update.