That's light shining through between the blade and liners on my new Police lightweight.
Seems every Spyderco knife I purchase will loosen itself at the pivot simply by manually opening them with my thumb.
It's an easy fix with a dab of loc-tite, but I don't understand why this happens? I had it happen with every Police I've owned, my Manix XL, every Paramilitary 1 or 2, 90% of the various Military folders I've owned over the years, etc.
One time at work I even had the pivot pin on my Military simply fall out for this reason. The pivot was fine at the beginning of the day, and through using the knife a lot it loosened up to the point it fell apart.
As I mentioned, the Police is brand new, so it isn't from wear or abuse.
In the end it isn't a big deal, but it genuinely baffles me as to why Spyderco knives are the only ones that seem to do this for me.