A knee-shaped feature observed earlier in light scattering spectra of Ca0.4K0.3(NO3)(1.4) (CKN) below T-c is used as a strong argument in favor of mode- coupling theory of the glass transition (MCT). Our careful measurements reveal no "knee" in the spectra of two glass forming liquids, CKN and ortho-terphenyl. Instead of the knee the spectra show nontrivial broadening and an increase of the intensity with a temperature increase. Both variations are confirmed by neutron scattering measurements on CKN and are neither expected in the asymptotic MCT predictions nor in any other model.