Growing Peppers?

Hi everyone,

I'm new to the forum and relatively new to gardening. I've planted pepper plants, and they seem to be doing alright as far as I've been able to read, but the leaves on the plants...get holes on them....it almost looks like something burned through the leaves? Or maybe somethings eaten through them? Not all of them look this way...I don't believe I have a pest problem, as I've got two tomato plants nearby and they are just flourishing....I'm just wondering what it could be and if I'm doing something wrong? I live in Arizona...it hasn't been unbearably hot yet, so I don't think its the sun? Any help would be greatly appreciated =)