  We show that there is no real conflict between the two determinations of the
strange sea density from the opposite--sign dimuon production and from the
difference of the $F_2$ structure functions measured in neutrino and muon deep
inelastic scattering. Once non universal sea parton densities are introduced,
which take into account the effects of different mass thresholds and different
longitudinal contributions, the discrepancy is shown to disappear and both sets
of data are simultaneously well reproduced. No need for a large strange sea
content of the nucleon emerges.

High Energy Physics - Phenomenology