The leaves on my pepper plants are turning black

[sandyullom]

I have sweet pepper and hot pepper plants and all the leaves on them seem to be turning black. The plants look healthy other than that...is this normal? The only thing I can think of is that we did have a spotty frost a couple weeks back (and I accidentally left them uncovered), but none of them have died which I figured if they were hit by the frost they would have. Here are some pics of the jalepeno plants.

 

[vfem]

OOOOOOH! It looks like what I had on my basil plants last month!!! I was told it was because of the sun scorching them and they we're hardened off properly... whatever it was, the next set of leaves were fine... and then after that everything was beautiful and I just removed the ugly leaves when I saw the new ones were great! I really hope that's all it is for you too.

http://www.theeasygarden.com/forum/viewtopic.php?id=25339

Post #8 shows pics of my plants being black leaved and burned. Now they are GORGEOUS and huge!!!!!