Dakota, good post, man. And good ears. I will definitely be looking out for those "mistakes" next time I listen. The only one I can think of off the top of my head right now is the end of 'In My Life.' I've noticed it for years, and always wondered why they didn't fix it. After the very final note, there is a guitar note that is held a bit too long, and it sounds very "twangy." Being a guitarist, I know that exact sound all too well. It usually happens when you pluck a note, and your finger isn't perfectly on the fret, therefore creating the "twangy" sound. It most often happens with beginning guitarists. I always thought that was interesting.