STM has been used to characterize fluctuation properties of segments of step edges partly covered by C60 on Ag(111) at room temperature. The distribution of C60 at step edges exhibits a step orientation dependence: Low-symmetry step edges are more favorable for C60 binding. The temporal correlation functions of step segments between C60-covered step regions scale as a power law, with an average exponent of 0.23+-0.02, indicating that fluctuations of these “confined” steps are consistent with step-edge diffusion limited fluctuations. Parameters extracted from temporal correlation and autocorrelation analysis consistently indicate that close-packed steps have smaller fluctuation magnitude and higher step mobility than low-symmetry steps. The measured effective system sizes of step segments with different lengths show at most a weak step-length dependence. Fluctuation features thus yield the surprising conclusion that C60 molecules are not acting as pinning points that constrain mass transport along the step edges.