Corrosion on top door trim
 

Washing my car on the weekend and noticed some small corrosion "dots" about 1/2 way along 3 of the 4 upper door external door strips above the main windows.. I have the standard non Shadowline trim.... I'll be reporting when I take it in for service tomorrow.. there is also white powder under the window rubber right where this is occurring...looks like they are corroding....anyone else seen this ?

Do they look like this, James?
If so, I had the same problem a year ago and I replace the trim under warranty. It happened on the rear left window, close to B pillar.

Different by the looks of it...I have the standard non shadowline trim and it's at the top of the window trim about half way along the window width..near the window rubber.