Last night I installed my spanking new iPF 5100 (replacing an old and head-weary 5000), run it's self-calibration routine, and run off 8x10's of six printer test images -several with fully saturated color bars/spectra, and looked carefully at them today under indirect daylight, warm incandescent, and my Solux 4700K viewing light.
Aside from the expected overall shift in warmth/coolness under the varied color temps, nothing at all out the ordinary with any color. Great colors, excellent blacks (three active with either PK or MK black).
Pete