  It is shown that the recently introduced singularities of the microcanonical
entropy like "microcanonical phase transitions", and exotic pattern of the
microcanonical caloric curve T(E) like multi-valuednes or the appearance of
"dinosaur's necks" are inconsistent with Boltzmann's fundamental definition of
entropy S=ln[W(E)] for a system at equilibrium even for extremely large systems
as astro-physical ones.
