kind of unfortunate and I know it voids warranty. I am a produce manager and french cutting vegetables constantly with my s35vn recon. I must know my knife is clean. upon first disassembly I found rust in the pivot hole (coarsely machined) of the knife even though I kept my knife oiled constantly.. Put it all back together and disassembled 2 weeks later to find more rust.
Many people who cut moisture based food and sometimes rinse their blades off don't realize sometimes a bit of water or juices from food can creep down into the pivot under the scales. If left to sit there you will definitely get some rust no matter what steel you're using (apart from H1 etc.) always try rinse blades with the tip pointing at the ground so the water runs away from the pivot - not saying you don't know this already but just in case, it's a handy way to stop unwanted dripping into the pivot.