Information-preserving black holes still do not preserve baryon number   and other effective global quantum numbers
  It has been claimed recently that the black hole information-loss paradox has been resolved: the evolution of quantum states in the presence of a black hole is unitary and information preserving. We point out that, contrary to some claims in literature, information-preserving black holes still violate baryon number and any other quantum number which follows from an effective (and thus approximate) or anomalous symmetry. 
Dejan Stojkovic, Glenn D. Starkman, Fred C. Adams