Sent mine back two weeks ago and had it promptly serviced and returned. Looks like they polished up the feed ramp and removed some edges.
The only problem I had with the PM9 was an occasional failure of the slide to go into full battery, usually with the last round of the mag. I would have to thumb the slide forward about 1/8". The problem became less frequent as I broke it in. I've read on the other Kahr site that this was a common issue, so I'm curious if the recall had anything to do with it.