they are pre-flowers, any good grow book will tell you about them, they are described in detail in the book "marijuana botany" by robert connell clarke,they are pistillate or staminate premordia, this is completely normal and they are not going to fully bud only if you go to 12/12, they are just showing sexual maturity, this is supposed to happen, most new grow books now say you should not flower a plant untill it shows preflowers.Preflowers show regardless of photo period it's normal there is no problem...I can upload some pages from my books if it will make you feel better....
