Alright, let me give it a shot and see what happens when I plug in that number, will report back in a minute.
Edit:
Yeah, using 1 / 5000 in my example works. There is just a SLIGHT difference between the two, barely noticeable.
As for the shadows - I take it means that those of us who intend to use it in open world dynamic-light-only terrains are screwed for the time being?