  We show that contrary to recent papers by S. Albeverio, A. Yu. Khrennikov and
V. Shelkovich, point values do not determine elements of the so-called p-adic
Colombeau-Egorov algebra uniquely. We further show in a more general way that
for an Egorov algebra of generalized functions on a locally compact ultrametric
space (M,d) taking values in a non-trivial ring, a point value characterization
holds if and only if (M,d) is discrete. Finally, following an idea due to M.
Kunzinger and M. Oberguggenberger, a generalized point value characterization
of such an Egorov algebra is given. Elements of the latter are constructed
which differ from the p-adic delta-distribution considered as a generalized
function, yet coincide on point values with the latter.
