Bruce Miller is a rugged fullback who for three seasons has helped the 49ers run the football.As the lead blocker for running back Frank Gore, Miller has helped blast defenders and open holes for Gore, who has three consecutive seasons of more than 1,000 yards rushing.Now that Miller is out – lost for the season with a broken shoulder blade – the Niners might have to adjust some of the things they do, but their offensive personality shouldn't change, quarterback Colin Kaepernick said this week. Whether it's Anthony Dixon in at fullback, or re-signed Will Tukuafu -- or even running plays out of formations without a fullback -- the 49ers aren't going to go away from their power running game. "Once you get to game time, whoever's in at fullback for us, if they're doing well and they're making their blocks and not missing assignments, then, you know, 'OK, we can continue doing what we've been doing,' " Kaepernick told Eric Branch of the San Francisco Chronicle. "If it's something where it's not quite working and not quite fitting, then you have to make adjustments to try to put yourself in the best situation."The first test will come Monday night against the Atlanta...