Sebastian,
if you look closely at the disucssion thread about KPF you'll see that most of the posts are actually from yesterday (Saturday) -- so it's quite up-to-date. Everything described there is true so far.
I can assure one thing, though: by the time KPF4 ships we'll have all these issues sorted out. There is a strong business interest in having those two programs work together perfectly.
Vlk