We use twisted Fourier-Mukai transforms to study the relation between an
abelian fibration on a holomorphic symplectic manifold and its dual fibration.
Our reasoning leads to an equivalence between the derived category of coherent
sheaves on one space and the derived category of twisted sheaves on the other
space.Comment: 19 pages, to appear in the proceedings of the Workshop on algebraic
structures and moduli spaces, CRM Montreal, July 200