Drag en drop text is a marvellous feature, which I enjoy every minute of my working hours. It's also almost perfect.
There's one glitch when dragging the last word from a sentence to the position more forward in the sentence: the trailing space of the last word won't be removed.
Come to speak of it: when a segment starts with leading spaces, use of D&D will remove these spaces.
Another tiny glitch:
One extra normal space being inserted before the non-breaking space.