did you get this to work? Having same problem with macbook air. Started after i updated firmware i think. Same router as you. Netgear wants me to pay 130.00 to get support!
Bill on HHI said:
When I connect my USB printer to the Netgear WNDR4500 router, I cannot print from my MAC MINI. Tells me the print file is not accepted.
Net gear will not or cannot help me.