  The apparent attenuation of muon neutrinos relative to electron neutrinos is
a bit too low to be compatible with the most popular values of $\Delta m^{2}$.
Fits to $R(E_{\nu})$ favor values of $\Delta m^{2}>0.1$ eV$^{2}$. The fit
minimized by the Super Kamioka group in estimating neutrino oscillation
parameters neglects systematic errors. The fit is dominated by systematic
effects. The data being combined in recent fits may not be compatible since
there appear to be significant variations in the properties of the data with
time. A simple two component neutrino oscillation with $\Delta m^{2}$ in the
range of 10$^{-3}$ to 10$^{-2}$ eV$^{2}$ seems unable to account for the
observations.
