Discrete torsion orbifolds and D-branes

D-branes on orbifolds with and without discrete torsion are analysed in a u nified way using the boundary state formalism. For the example of the Z(2) x Z(2) orbifold it is found that both the theory with and without discrete torsion possess D-branes whose world-volume carries conventional and projec tive representations of the orbifold group. The resulting D-brane spectrum is shown to be consistent with T-duality.