I'm still early in chapter 2 with most of my characters at level 6 and I have yet to see any bugs. Now I've been around gaming a LONG time and I've beta tested heaps of games back in the day when I was sent a FREE copy of the game for beta testing it. (which is why I refuse to pay for the privilege). Some of you here might remember the release of Daggerfall!!!! I had a collectors boxed copy flown out to me by express delivery which I paid more for than the actual game. It was a TOTALLY unplayable bugged out mess which had to be patched daily for months. (or at least it seemed that way to me) Today many claim it's the best of the Elder Scrolls series (at least before Skyrim) and it is a favourite of mine once I could actually play and finish it.
P:K is far better, especially so far as bugs are concerned and the devs are doing the right thing, so let's support them, not tear them down. Having spent hundreds, if not thousands of hours testing games over many years I know it is impossible to find every bug in a large and complex multi-path game like this. Is it perfect? Obviously not; no game is, but so far it is one of the best games I have played in years!!