  It has been shown that very light or even massless neutralinos are consistent
with all current experiments, given non-universal gaugino masses. Furthermore,
a very light neutralino is consistent with astrophysical bounds from
supernov{\ae} and cosmological bounds on dark matter. Here we study the
cosmological constraints on this scenario from Big Bang nucleosynthesis taking
gravitinos into account and find that a very light neutralino is even favoured
by current observations.
