July 24, 2004 -- Linda Ronstadt once again sang the praises of "Fahrenheit 9/11" filmmaker Michael Moore during a concert — and again some angry fans headed for the exits. In California on Thursday, the singer ended a performance in Livermore as she had done last Saturday in Las Vegas — with an encore dedication of the song "Desperado" to Moore. It won cheers, some boos and a few cries of "traitor," the Contra Costa Times reported yesterday. About 100 concertgoers left early, the newspaper said.