After approximately 500 trouble free rounds through my PM9, the 6 round magazine follower broke. On July 25 I called Kahr and was sent a new follower which I received on Aug. 3. After reading a post by CJB which described the reason and cure for broken followers, I followed his advise. I removed the slide and barrel, installed the barrel only in gun with slide lock pin in place. I inserted the magazine and pushed rearward on the barrel showing where the barrel feed ramp made contact with the magazine follower. It was difficult for me to tell exactly where the ramp was hitting so I applied a small amount of fingernail polish(my wife's, not mine) to the bottom of the feed ramp, pushed rearward on the barrel and inserted the magazine. Upon removing the barrel the nail polish was smudged where it was making contact. I sanded and polished the feed ramp where it was making contact and pa-pow! No more ramp/follower contact.
I just returned from the range after shooting 100 rounds with not a single problem. It is still early to tell but I think the problem is solved.