The reason I suggested there may be cal deficiency was the leaf on pic 2 has some "rust spots". http://www.marijuanapassion.com/forum/showthread.php?t=53717
Often a calcium deficiency is actually caused by something else causing a lockout. This can often be ph related. So I would first suggest making sure your ph is in the right zone, no point trying to correct anything unless ph is correct. For soil, it should be in the 6.3 to 6.8 range (http://www.marijuanapassion.com/forum/showthread.php?t=1908
If ph is ok, your nutes have the right balance of nutrients so it should correct itself but the existing damage may remain.
I would recommend you bookmark the 2 links above, they have saved my plants on numerous occasions, along with this one by Hick http://www.marijuanapassion.com/forum/showthread.php?t=1956
If you do need to try and add calcium, calmag is probably the most common additive but you can also buy liquid calcium and to correct a magnesium deficiency, epsom salts is often used (I use it as a foliar spray when needed).
Keep an eye on it and hopefully it wont get any worse or spread to other parts of the plant.
Let us know how things go, especially the sex of this plant, I dont see anything to suggest is is a hermie but it is not flowering yet.
If the mother of this plant hermied or is from bagseed, watch it closely and keep everything crossed, use it as a learning experience and try to get some good genetics.
Stay frosty fella. W