X0101 EFFECT 33 LIVE 2010-11-26 0000728889-10-001717 485APOS 0000275857 OPPENHEIMER AMT-FREE MUNICIPALS 002-57116 S000006957 OPPENHEIMER AMT-FREE MUNICIPALS C000018975 A S000006957 OPPENHEIMER AMT-FREE MUNICIPALS C000018976 B S000006957 OPPENHEIMER AMT-FREE MUNICIPALS C000018977 C S000006957 OPPENHEIMER AMT-FREE MUNICIPALS C000096805 Y