Which way does the thumb turn for the 49ers after their 17-6 victory over the Minnesota Vikings in Friday's preseason opener, including a dazzling run by daddy long legs Colin Kaepernick, an impressive stable of running backs, good catches and bad drops by rookie A.J. Jenkins, DeMarcus Dobbs in a No. 40 jersey, Carlos Rogers in single coverage, shaky replacement refs and much more? Check inside.