Red Bone

I prefer puzzles to traditional so I'd be willing to give yours a try.

Although I first began Geocaching 7 years ago, I am still a "newbie" to it. I started with a Magellan 300 and felt if I got within 100 feet of the cache coordinates I was doing well. Now that I have returned to geocaching I knew that I needed a better GPS unit and, following my due-diligence, decided on a DeLorme PN 40. I am very satisfied with it (including its phenomenal accuracy)...but I need some advice. I know that many of the caches I find have been in place for several years and were located with older, less accurate GPS units. What I need to know is what should I do/say when I locate a cache that appears to be over 20 feet from the listed coordinates. Should I notify the cache owner or just sign the log and move on? Thanks.