  It has been suggested recently that in a consistent theory any Minkowski
vacuum must be exactly stable. As a result, a large class of theories that in
ordinary treatment would appear sufficiently long-lived, in reality make no
sense. In particular, this applies to supersymmetric models in which global
supersymmetry is broken in a false vacuum. We show that in any such theory the
dynamics of supersymmetry breaking cannot be decoupled from the Planck scale
physics. This finding poses an obvious challenge for the idea of low-scale
metastable (for example gauge) mediation.
