i see what your talking about my man,but i don`t see it as a problem.
from what i know, and have read, the big fan leaves do turn yellow at the edges when in flower, due to the girls putting everything into producing bud.
some ppl may see it as a "def" of some sort,but hey,they look good to me.
keep an eye on them though,if just the fan leaves slightly yellowing at the edges,don`t worry.
good luck man.
oh yeah, what are your "grow facts" i.e lighting,soil,hydro etc:48: :fly: