  We analyze the impact of recent solar and atmospheric data in the
determination of the neutrino oscillation parameters, taking into account that
both the solar nu_e and the atmospheric nu_mu may convert to a mixture of
active and sterile neutrinos. Furthermore, in the context of the atmospheric
neutrino problem we discuss an extended mechanism of neutrino propagation which
combines both oscillations and non-standard neutrino-matter interactions. We
use the most recent neutrino data, including the 1496-day Super-K solar and
atmospheric data samples, the latest SNO spectral and day/night solar data, and
the final MACRO atmospheric results. We confirm the clear preference of all the
data for pure-active oscillation solutions, bounding the fraction of sterile
neutrino involved in oscillations to be less than 52% in the solar sector and
less than 40% in the atmospheric sector, at 3 sigma. For the atmospheric case
we also derive a bound on the total amount of non-standard neutrino-matter
interactions, bounding the flavor-changing component to -0.03 <= epsilon <=
0.02 and the non-universal component to |epsilon'| <= 0.05.
