About every forth blade my wife's Henson will break the blade. It happens to both Astra SP and Super Iridium. It affects only one side. Sometimes there's only a crease, sometimes the blade only partially tears, and sometimes the edge will just fall off. She got a pretty good cut a couple of months ago. Please excuse the rust. That blade has been in the blade bank for quite a while and I dug it out for the photo.