i wouldnt worry that much....i get an occasional yellow leaf here and there.....the one thing that does worry me that its on the top of the plant....the temps look to high.....what kinda air flow do you got going on it there? I think you should of put this in the problems section and fill out the troubleshoot form fast! So we can all have a idea of the whole picture! See u in the problems section itailian....damn the grwo was looking awesome too!