  We compare quantum corrections to semiclassical spinning strings in
AdS(5)xS(5) to one-loop anomalous dimensions in N=4 supersymmetric gauge
theory. The latter are computed using the reduced (Landau-Lifshitz) sigma model
and with the help of the Bethe ansatz. The results of all three approaches are
in remarkable agreement with each other. As a byproduct we establish the
relationship between linear instabilities in the Landau-Lifshitz model and
analyticity properties of the Bethe ansatz.
