FYI, even though the OP found his problem to be incorrect connections at the breaker, the procedure for finding a ground wire to equipment ground connection helped me figure out my issue... I had an AFCI circuit that works fine but the last recepts in the circuit hadn't been finished, I did all of them but skipped the next in line, when I put in the last recep which connected to the hot wires, I started getting AFCI trips. I had a ground wire that was contacting a neutral in one of the later outlets.
Please do NOT consider any "before" picture of my house as any kind of endorsement of any particular construction method. In fact, you should probably assume that if I post a "before" picture, I am posting it because I am soliciting advice on a proper replacement for one of MANY things done wrong by a previous owner.