Matthew:
Ours is a 98 contessa, so I think we have the same windshield/gasket/front cap. We have now owned this coach 2 1/2 years. Until this fall, I ddin't notice any movement of the windshield. I parked the coach for 7 months on a relatively level slab behind the house. After parking it, I cleaned and inspected the whole coach, including the windshield. I put out the slide and leveled with the jacks. There it sat until I was getting ready to head south for the winter. I noticed that there was now a gap at the upper outer corner of the driver's windshield. The gap was about 3 to 4 inches long, around the corner, and up to 1/4" wide. I caulked it with Lexel and watched it. Half way south it was still there, but somewhat narrower. Now that we have been parked for a while, the gap is gone, but there is still a 1/8" of white paint showing, that used to be covered by the black gasket.
My conclusion - don't panic. these coaches are in motion, whether from temperature changes, humidity changes, driving, levelling stresses, or whatever. If it never moves back to its original position, you may have something to fix, otherwise, it isn't that serious.