  We discuss whether the NuTeV anomaly can be explained, compatibly with all
other data, by QCD effects (maybe, if the strange sea is asymmetric, or there
is a tiny violation of isospin), new physics in propagators or couplings of the
vector bosons (not really), loops of supersymmetric particles (no), dimension
six operators (yes, for one specific SU(2)-invariant operator), leptoquarks
(not in a minimal way), extra U(1) gauge bosons (maybe: an unmixed Z' coupled
to B-3L_mu also increases the muon g-2 by about 10^{-9} and gives a `burst' to
cosmic rays above the GZK cutoff).
