I would encourage all to check the bottom seal area of the doors for rust.
Three weeks ago while while wiping down after a wash I noticed rust on the inside bottom of the back right passenger door.
It freaked me out !!
Took it the dealer ... it will get repaired next week under warranty (and it should).
My car was purchased New Years Eve, 2010.
Not sure if I will be keeping it.
None really except for passing Equinoxs' and Terrains' while they are trying to get up to speed.