Crack of Death FILETIME=[F3715D00:01C16FD3]

On ALL of my spridgets with roll-up windows, I have the inevitable crack
in the top of the door right above the handle on the left door. I was
curious if the owners of RHD cars have the same crack on the right door.
If not, then it was a defect in the manufacturing of the door. If so,
then it is just a weak design for the amount of use the driver door
receives. Just curious, Brad