I removed the drivers door panel to investigate a malfunctioning power window, here is what I found.

The 10mm nut in the middle of the door (about 10" straight up from the motor) had worked it's way through the hole in the metal, the round black plastic "thing" that the bolt is supposed to seat in, was sitting in the bottom of the door. The 10mm nut that secures the motor had almost worked through the metal.

I put some thick, oversize washers on, replaced the plastic "thing" and tightened the nuts. The window now goes up and down but I can feel a slight flexing of the metal in that area when I operate the window.

I know my fix was not a ccrrect one, please guide me in the right direction.