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An examination of four hot issues from the 49ers' 34-28 win over the Packers:Kaepernick's arm: The Green Bay Packers have to be flummoxed. In their last game against the 49ers, in the playoffs in January, the Packers saw Colin Kaepernick run for 181 yards. The Packers spent the offseason trying to learn how to better defend the read-option. What happened in their opener at San Francisco on Sunday? Kaepernick ditched the read-option for the most part and threw for a career-high 412 yards.