Does anyone else's headliner sag a bit in the center, just above the rear-view mirror? There's about a 1" vertical gap in mine between the front edge of the headliner and the windshield glass near the top of the windshield. I can push this gap closed with light pressure (but of course it remains gapped without pressure). The left and right sides of the front edge of the headliner have much smaller gaps to the windshield than the center.