  We compute energy gaps and study infalling massive geodesic probes in the new
families of scaling, microstate geometries that have been constructed recently
and for which the holographic duals are known. We find that in the deepest
geometries, which have the lowest energy gaps, the geodesic deviation shows
that the stress reaches the Planck scale long before the probe reaches the cap
of the geometry. Such probes must therefore undergo a stringy transition as
they fall into microstate geometry. We discuss the scales associated with this
transition and comment on the implications for scrambling in microstate
geometries.
