Abstract: The chromatic view of stable homotopy theory uses the algebraic geometry of formal groups to organize calculations and the search for large scale phenomena. One of the guiding principles, due to Hopkins, is the Chromatic Splitting Conjecture, which predicts how to rebuild stable homotopy types from simpler pictures. Recently we have seen that this conjecture is not quite true; we will discuss what goes wrong and how it might be fixed. This is joint work with Agnes Beaudry and Hans-Werner Henn, with the hard part done by Beaudry.