Well, it's new for me, at least.
You know the little plastic extensions in the visors? Mine rattle - driver's side seems to be worse, probably because it gets used more.
I don't think I feel like whining to the dealer and having him order a new one, probably just see if I can tape the back of it or something to make it quiet down.
Urgh. When they said they designed this car to sound more like an American muscle car, I thought they were only talking about the exhaust.....

 

after having an Infinty perfect sub for a year and half, i have more rattle than i know what to do with.

 

I fixed it by taking the soft side of a velcro strip and sticking it to the back side of the visor extension. Did the trick. I also used this to fix my rear window rattle. Stuck in between the rear window and the brake light. NO MORE RATTLE!!!! Also used it on the front lisence plate. I didn't want it to rub against my paint and ruin my bumber. Just stuck it to the back side of the fron tlisence plate holder thing. Velcro......the next best thing to duct tape!!!