looks normal to me too senor. maybe a little early, but those leaves probably aren't getting a whole lot of light. so that combined with the fact that the plant is flowering is definitely plausible. i don't think that you have anything to worry about with that.

on one of the pics the fans up near the top of the plant are a little yellow. next time you might want to give your ladies a little more N before you flip them. some people like to gradually change over with a schedule similar to this....

2 parts veg/1 parts bloom
1 parts veg/1 parts bloom
1 parts veg/2 parts bloom
all bloom

that is obviously not specific, but more of an idea. this will help ensure that your ladies get enough N through flower because although they don't need much N during flower, they do need some as it's necessary in the production of chlorophyll and amino acids as well as essential for photosynthesis. it is also an essential element of tissue.

hope that helps.


-shake


if those plants have been in flower then they should just about be done stretching. i think if you were root bound you would be experiencing more problems than just the yellowing of leaves. that's just my $.02.