This was sent to me by a fellow member in response to a post from another member that mentioned "stress risers"

You will notice in the photo from Ron's post there is in fact a radius at the tang, albeit a small one, but a radius nonetheless. This indicates to me that RMK is aware that a sharp inside corner is detrimental to the durability of a knife, but is it enough? It doesn't appear the knife broke at the radius, but actually snapped beyond the radius possibly indicating another issue. Comparing the photo to the representations in the diagram, you be the judge.