There are a few issues with the DSFML modules in the DSFML svn. I'm compiling with the latest dmd (v2.051) and getting issues in videomode.d : 103, where
bool opEquals(VideoMode other)
should be
const bool opEquals(ref const VideoMode other)
And in window.d
this(VideoMode mode, char[] title, Style windowStyle = Style.RESIZE | Style.CLOSE, WindowSettings settings = WindowSettings())
should be
this(VideoMode mode, string title, Style windowStyle = Style.RESIZE | Style.CLOSE, WindowSettings settings = WindowSettings())