Pasadena-based Jurgensen's will hold a stockholders meeting on Oct. 8 to consider approval of a previously reported merger in which Old Dominion Financial Corp. will acquire ownership of the company . . . Proctor & Gamble has purchased a minority stake in Metaphor Computer Systems of Mountain View, Calif., for $10 million . . . Standard & Poor's downgraded $425 million of debt for InterFirst Corp., Texas' third-largest bank holding company.