Lexus IS250SL, 2007 model
Recently had a rattle at head height on the drivers side pillar.
Lexus checked it out, said it was old door seals, and applied a lubricant of some kind which fixed it.
When I went to test drive it, I heard a new rattle in the dash - sounded like it was the air vent issue mentioned in this thread.
I was told that there was no obligation for lexus to fix it under warranty. Took a bit of convincing, but they managed to get it looked at under warranty.
Couple of days later and the job was done. I was told the fix was to be a foam insert in the dash, but the service report mentioned clips I think.....
Anyway, car is now quite again.