A combined study of the morphology and the kinetics of isothermally grown spherulites of poly(ethylene oxide) (M(w) = 20 000) has revealed that a break in the log G versus T(c) plot coincides with a change in the crystallographic orientation of the leading growth face. Because, in the ’regime III-->II transition’, the growth front is assumed to maintain the same crystallographic orientation, we conclude that the observed break cannot be taken as the signature of such a transition.