In dueling decisions Thursday about free speech, the Supreme Court upheld Texas' refusal to issue a license plate bearing the Confederate battle flag and struck down an Arizona town's restrictions on temporary signs put up by a small church. The court unanimously said the town of Gilbert, Arizona, ran afoul of the First Amendment by setting tougher rules for signs placed in the right of way along public streets to direct people to Sunday church services than for signs for political candidates and real estate agents.