could be a little creep showing there, or the serving wasnt put on quite tight enough - or any number of things. if the cable isn't lengthening or fraying right there - its no worries at all. what if i told you that strings and serving were made outof the same thing? if i unwind serving and take a single strand of it - and unwind that - and handed it to you along w/ a piece of string material of the same diameter - you wouldn't be able to tell me which was which - now ain't that a trip.