Here is another article about the circuit breakers. It would appear from their wording there could be other breakers that are counterfeit.

IPR participants has seen counterfeit circuit breakers that overheat and explode, fake power cords that cause electric shock, and knock-off aircraft parts that put lives at risk. Intellectual Property Rights (IPR) is not just about selling fake designer clothes or pirated DVD's. The counterfeit circuit breakers include Square D QO-series models 115, 120, 130, 160, 215, 230, 260, 1515, and 1520. Actual Square D circuit breakers have (a) the amp rating written on the handle in white paint on the front of the breaker; (b) on the side of the breaker, where wire terminal screw is located, the arc shoot opening should have squared corners with the bottom edge of the opening angled up; (c) the mounting clip should be yellow chromate with half of the top of the clip visible; and (d) the Square D insignia should be molded onto the breaker. If your Square D breaker does not match this description, it could be counterfeit.