Bobbles don't have Bears too concerned

All concerned parties agreed that the Bears' center-quarterback exchange problems Monday night did not signal the end of civilization as we know it.

Blown out of proportion?

"Definitely so," said coach Lovie Smith. "Don't panic on any of that stuff; we're fine. That's what you do in training camp, you see you have some problems, and you start fixing them -- and that's what we're doing."

Quarterback Rex Grossman and center Olin Kreutz both accepted blame for the pair of bobbles.

"I should always get it, no matter what, whether it's a bad snap or not -- and it wasn't a bad snap," Grossman said. "It's just something that we're going to work on, and hopefully it doesn't happen again for the rest of the season."

According to Kreutz, "The first fumble was a protection issue, and the other (two) fumbles were my problem. You guys say whatever you want; we keep it in the team, and we keep moving forward."

Grossman said he may have been a little too anxious to get the play started.

"It's just maybe pulling out a little bit too soon," he said. "Just back to fundamentals; start with the snap and go from there."

On the nose: The Bears spent $25 million to add veteran Darwin Walker to their defensive tackle rotation and also added veteran Anthony Adams as an unrestricted free agent. But a player they already had on the roster, Dusty Dvoracek, has been their best interior lineman in the preseason.

"Dusty's playing well," defensive end Adewale Ogunleye said. "He not only tries hard, he's making plays, and he's showing that he belongs to be out there with the ones. He just has a fire and a type of energy that helps; that we all feed on. He's a nose guard, and the nose guard is kind of like the center of the defensive line."

Dvoracek was a third-round draft choice in 2006 who missed his rookie season with a foot injury.

It's possible: Defensive tackle Tommie Harris continues to be brought along slowly, leading to speculation that he won't be 100 percent for the regular-season opener vs. the Chargers. He hasn't taken a preseason snap and is questionable for Saturday.

"He's making progress," coach Lovie Smith said. "Right now, we're being cautious. Everything we do is about San Diego, so we won't take any chances with him. He's getting better every day."

Smith was asked by a reporter if there was a possibility Harris might miss the Chargers game, too.

"Sure," he said. "There's a possibility you'll miss it, too. We hope that you're there, and we hope that he's there, too."

Injury update: Wide receiver Brandon Rideau and defensive lineman Israel Idonije both missed Wednesday's practice with ankle injuries. Idonije's is considered minor, while Rideau's is more serious.

Offensive tackle John St. Clair, who started the first two preseason games for John Tait, was held out with a minor shoulder injury.