X0101 EFFECT 33 LIVE 2006-10-11

N-1A

0001357431 Oppenheimer Rochester Minnesota Municipal Fund 333-132783 S000012507 Oppenheimer Rochester Minnesota Municipal Fund C000034009 A S000012507 Oppenheimer Rochester Minnesota Municipal Fund C000034010 B S000012507 Oppenheimer Rochester Minnesota Municipal Fund C000034011 C