San Francisco 49ers head coach Jim Harbaugh signals a touchdown after watching the stadium television replay Delanie Walker's touchdown in the fourth quarter of an NFL football game against the Detroit Lions, Sunday, Oct. 16, 2011 in Detroit. The Lions called for a review and the replay confirmed the touchdown called on the field. (AP Photo/Duane Burleson)

Associated Press
San Francisco 49ers head coach Jim Harbaugh signals a touchdown after watching the stadium television replay Delanie Walker's touchdown in the fourth quarter of an NFL football game against the Detroit Lions, Sunday, Oct. 16, 2011 in Detroit. The Lions called for a review and the replay confirmed the touchdown called on the field. (AP Photo/Duane Burleson)
San Francisco 49ers head coach Jim Harbaugh signals a touchdown after watching the stadium television replay Delanie Walker's touchdown in the fourth quarter of an NFL football game against the Detroit Lions, Sunday, Oct. 16, 2011 in Detroit. The Lions called for a review and the replay confirmed the touchdown called on the field. (AP Photo/Duane Burleson)
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