"Warnings abound on the impact of delayed foreclosures on U.S. residential mortgage bonds, but the investors in the securities have not yet taken heed. Processing errors now plaguing at least three major firms that service mortgage loans -- including GMAC Mortgage -- may prolong the time it takes to complete foreclosures, raising the chances for deeper losses to bondholders as taxes and insurance payments are fronted, investors and analysts said. Proceeds from foreclosure sales also tend to decline as the process is dragged out, harming the investors, which run the gamut from pension and mutual funds to insurance companies..."