Ohh good eye. I didn't catch that the first time around.
EDIT: That one in the back looks good. Just one bad leaf. Could be transplant shock, which will go away eventually if you care for it right. Could be over/under watering...
when and How did you plant them? What was your process? Did you put any fertilizer? Im not telling you to put fertilizer one way or the other, just asking.
When do you water them, and how much?