IT always loomed as one of life's great certainties, like death and taxes, that News Corporation and Fairfax Media would extend their print-media cage fight to other battlegrounds, where they could continue to slug it out. A year ago, a skirmish kicked off in the $1 billion property advertising segment when Fairfax took a half-share of Antony Catalano's MMP publishing venture with a group of high-profile Melbourne real estate agents, paying $35 million and injecting its Fairfax Community Newspapers' 32 suburban mastheads in Victoria.