I forgot no such thing. Energy equals h*c, not h-bar*c. The equation properly uses Planck's constant (h), not Dirac's constant (h-bar). Planck's constant is the correct choice in the above equations.
richtig_faust says: "BUT doppler shift is a frequency shift measurement, they are NOT measuring momentum, they measure FREQUENCY."
Of course they measure frequency, nobody has suggested otherwise. However the result of a decrease in momentum of a photon is a commensurate decrease in the observed frequency.
--Boot Hill