To get the case fully working under KitKat 4.4.2 I did some workarounds:
- replaced the IC chip with original one from s-view case (as it is described in this topic)
- put a small magnet from the old earphones on the magnet installed in the cover (no glue is needed
Now I have case fully working and precisely activating s-window during closing the cover. But there is no solution for the home button yet. Until Samsung, in the next releases, activates home button while cover is closed, the button is not usable completely.
I'm really interested in response of Spigen. They still sell an unfunctional case and there in no official replay about problems with KitKat.