Retraction of "Near-Deterministic Discrimination of All Bell States with   Linear Optics," Phys. Rev. Lett. 107, 080403 (2011) and Erratum Phys. Rev.   Lett. 107, 219901 (2011)
  The original versions (1 and 2) of this paper paper contain a fatal error. All my attempts to patch the error have failed. As a service to the community I explain the error in some detail. 
Mladen Pavicic
quant-ph