Summary: Some recent articles on the Klein paradox announce reflexion coefficients exceeding 100%. The origin of this result seems to be a widely disseminated misprint [A. Hansen and F. Ravndal, ibid. 23, No. 6, 1036–1042 (1981)] which is pointed out and rectified. In conclusion, a new approach to the problem – by means of Furry’s interaction representation for an external field – is indicated.