Ya know, I had leaves just like the one your holding and no matter what symptom solution I looked up, nothing had a picture of exactly what it was.
Based on suggestions I recieved, I picked up some fert that had alot of Mirco nutrients in it and that seemed to help alot... well, that and the plant turned out to be male, but it was starting to be healthy before I killed it!

I can't remember the exact name of the fert, but it was for Orchids and from Lowes.

Good luck! Misc symptoms can be a PITA.