Went in there to change one to afci and found this.
Is this corrosion? And why is it only one? I know most of the house breakers are on the right, but it never feels warm or hums. I really hope this isn't going to be a another problem to have to get fixed. Here's a large pic of the entire panel if anyone wanted to look it over. It's a GE panel with all GE breakers except the one for the AC. It's a Siemen breaker for some reason. http://img11.imageshack.us/img11/5716/largeca.jpg