Gov. Arnold Schwarzenegger opposes Proposition 19, which would legalize the recreational use of marijuana, but he offered a consolation Thursday by signing a bill that would downgrade possession of an ounce or less from a misdemeanor to an infraction. SB 1449 was written by state Sen. Mark Leno (D-San Francisco), who said it will keep marijuana-related cases from going to court-clogging jury trials, although the penalty would remain a fine of up to $100 but no jail time.