From polarized neutron reflection experiments on a thin Co layer on glass at various applied fields it is shown beyond doubt that neutron spin-flip reflection in an applied magnetic field is non-specular in agreement with theory. It is shown that the deviations from the specular position at moderate fields is very substantial for wavelengths larger than a few tenths of a nm. The advantages of a curved stacked-mirror polarization analyzer, which recently has been installed on ROG at IRI, are discussed.