The driver side window on my 2005 V6 Mustang has started making a squeaking type noise when it travels the 1/4 inch or so up and down when you open and close the door.

I have 35,300 miles so am planning on taking it in for a last bumper to bumper warranty sweep when I get my 36K oil change.

Has anyone else experienced this? If this is a precursor to something going bad I want to get it fixed now while I still have warranty.
Thanks.