I have a brand new Spyderco Endura 4 FFG with FRN handle. I think I've found a problem, I have never sharpened the blade and it is still razor sharp. All I have cut with it is paper to test the sharpness. There is a very small but noticeable gouge in the edge of the blade, and it seems to perfectly match up with a small cut in the FRN spacer where the blade would rest whilst it is closed. I have an album on Imgur that you can find here: http://imgur.com/a/Gybd4
If anybody has an Endura 4 FFG FRN of their own I would love to hear if they are running into the same problem, it seems a little ridiculous but this is the only explanation I can find for the gouge in the blade.