  Mason and Ng have given a generalization to semisimple quasi-Hopf algebras of
Linchenko and Montgomery's generalization to semisimple Hopf algebras of the
classical Frobenius-Schur theorem for group representations. We give a
simplified proof, in particular a somewhat conceptual derivation of the
appropriate form of the Frobenius-Schur indicator that indicates if and in
which of two possible fashions a given simple module is self-dual.
