  After a quick review of astrophysically relevant limits, I present a summary
of MeV scale tau neutrino mass limits derived from accelerator based
experiments.
  I argue that the current published limits appear to be too consistent, and
that we therefore cannot conclude that the tau neutrino mass limit is as low as
usually claimed. I provide motivational arguments calling into question the
assumed statistical properties of the usual maxumum likelihood estimators, and
provide a prescription for deriving a more robust and understandable mass
limit.

High Energy Physics - Experiment