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We present evidence of wavelength-dependent variations within the infrared,optical, and ultraviolet pulse profile peaks of the Crab Nebula pulsar. Theleading and trailing edge half-width half-maxima of the peaks display cleardifferences in their wavelength dependences. In addition, phase-resolvedinfrared-to-ultraviolet color spectra show significant variations from theleading to trailing edges of the peaks. The color variations between theleading and trailing edges remain significant over phase differences smallerthan 0.0054, corresponding to timescales of $<180 \mu$s. These results are notpredicted by any current models of the pulsar emission mechanism and offer newchallenges for the development of such models.Comment: 12 pages, 4 figure

Infrared-to-Ultraviolet Wavelength-dependent Variations Within the Pulse Profile Peaks of the Crab Nebula Pulsar