[clkeiper]

it looks like mite damage in the first pictures you posted to me, but in the second set of pictures I see a winged aphid in the first photo right on the edge of the leaf (which I sincerely think will cause the damage you are seeing. I would expect to see them all over the backs of the leaves and on the new growth to make a difference in the plants health, spray the plants with a strong spray of a healthy dose of soapy water) and in the third photo the bottom of the leaves look as if there is some fungal issue going on...like patches of grey mold like tomatoes get. I have never noticed my peppers affected by fungal problems, but that could just be that areas in which we both garden being so very different or just the appearance in the photo.