To clarify, I'm referring to the Gemini, Ursa Minor, Intrepid, and Guru that I received, which are the last Kizer knives I have bought. I haven't checked the pivot on my Intrepid Mini yet. I honestly didn't think it was a big deal as many of the knives I've taken apart didn't have loctite.
The threads on these Kizers were looser (or smoother depending on how you look at it) than most, which probably added to the screw loosening after repeated flipping. Again, I don't see this as a big issue. I think I did mention to Tracy that blue loctite would be appropriate when we were going back and forth about a machined clip order.