Mine did that too, and now its almost completely gone. Always happened during very light braking at >10mph. I was going to take it in and mention it during the 1k mile free check up, but I guess its normal and I'll search that "rebedding" thing and I'll still mention it during the check up. (in case it becomes a problem later on so it would be documented and not blamed on me).

 

ok well my car has 30k+ on it and does it. could it be that little piece with the arrow is missing?