Maybe a defective screw? I can't, for the life of me, imagine CRK using a lock style screw. They include loctite in their tool kits. I understand everyone has mondays and fridays, but for CRK that's unusual. Use of a lock screw isn't the answer to that problem...so IDK why CRK would do that. As you know lock screws work by having distortion in the threads to "lock" them in place for things that will rarely or never be taken apart. CRK knows that isn't the case with a pocket clip, so why do it? This distortion can also lead to buggering up the threads in the Ti, so why risk it? Maybe a burr was present during initial installation and that caused the flattening...or just a crappy screw that should have been discarded upon initial inspection. I have seen that from other companies (Notably on a Microtech S/F that I bought new), just never from CRK. If all else fails...hit up Jessie @ CRK and see what she has to say. I'd be interested in her answer.