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San Francisco 49ers' Colin Kaepernick is congratulated by Joe Staley after running for a 78-yard touchdown in the second quarter at Candlestick Park in San Francisco, Calif. on Friday, Aug. 10, 2012. The San Francisco 49ers played the Minnesota Vikings. (Jim Gensheimer/Staff)

SANTA CLARA -- Colin Kaepernick said teammates encouraged him to "move on" from his first loss as the 49ers' starting quarterback and focus on the upcoming visit by the Miami Dolphins.

Among Kaepernick's boosters is left tackle Joe Staley, who hasn't let his friendship with Alex Smith cause any hint of a divided locker room.

"Colin is our quarterback, and I support him 100 percent," Staley said Wednesday. "The whole team is behind him and wants him to succeed, and help the team succeed. We're happy to have him back there."

Kaepernick won his first two starts before Sunday's 16-13 overtime loss at St. Louis. Asked if he's willing to commit to Kaepernick for the rest of the season, coach Jim Harbaugh replied: "We've got faith in Colin and the way he plays. Therefore, another start this week."

Kaepernick said the biggest thing he learned in defeat was he "can't make mistakes." He was pleased, however, with how well he read defenses and went through his receiving progressions.

Kaepernick sounded unfazed by recent publicity over his widespread tattoos, his birth mother's wish to reconnect and his pet tortoise, which has its own Twitter account. "It's not a problem for me," Kaepernick said of those off-field matters. "I don't read any of that stuff. I'm here for football."

  • Harbaugh was still agonizing over Sunday's call that resulted in an errant pitch and the Rams' tying touchdown. "It's like somebody reached into your chest and stomach and started pulling the innards out without using any anesthesia," said Harbaugh, adding that coaches didn't provide an audible option for that play.

    Harbaugh didn't take offense to Rams coach Jeff Fisher's postgame comment, in which Fisher wondered what the 49ers were "trying to accomplish" on that play. Harbaugh thought Fisher was merely being "quizzical" rather than disrespectful, though he added: "That's low-hanging fruit -- 'What the heck were they doing?' "

  • With Smith's career seemingly in limbo again, that conjures up memories of his free-agency visit March 11 to Miami. "He's a first-class individual and an excellent football player," Dolphins coach Joe Philbin said Wednesday. "You can tell he's a team guy, an unselfish guy, loves the game."

    Did the Dolphins love Smith enough to make him an offer? "We had a great visit, and we'll leave it at that," Philbin responded. "Any relationship takes two sides to tango."

    Two days later, Smith re-signed with the 49ers on a three-year, $24 million deal.

  • Harbaugh said his brief acting career "has been all downhill" since a 1996 cameo in "Saved By The Bell: The New Class," an episode that's gone viral this week on YouTube. Appearing as himself during his Indianapolis Colts heyday, Harbaugh preached a familiar message in the show: "People think I'm a hero because I can throw a football. But I wouldn't be anything without my teammates."

    In the episode's conclusion, Harbaugh delivers a powerful slap to the back of his cousin Screech (played by Dustin Diamond). It's a scene Harbaugh reenacted 15 years later in a controversial postgame encounter with Detroit Lions coach Jim Schwartz. "There's the evidence that it's just a normal handshake!" Harbaugh joked Wednesday.

  • Cornerback Tarell Brown did not practice for the first time this season after aggravating a knee injury Sunday. Chris Culliver, his likely replacement in the starting lineup, suited up for practice but left at the start after apparently becoming ill.

  • Wide receiver Mario Manningham's aggravated shoulder injury kept him out of practice. Kicker David Akers (pelvis) and linebacker Aldon Smith (shoulder) were limited. New to to the injury report but fully practicing were guard Mike Iupati (shoulder), linebacker NaVorro Bowman (shoulder) and cornerback Carlos Rogers (knee).