Hey,
Things aren't looking to bad. From what I have found as you get closer to the end of your grow your plant will start to fade a little, this will cause some of the lower leaves and stems dying. The little amount I can see from your pics, I wouldn't worry to much. Looks like they were twisted a little bit or some slight damage done and they are dying and falling off. Things look great to me, just hold steady for the last couple weeks and you should be good