What the repair guy found
I took our MH to a reputable glass repair shop and had it checked out. It seems that when the windshield was installed, it didn't fit properly in the first place. A bead of black butyl was applied around the inner window to seal the open seam where the window didn't meet the rubber seal. Another bead was applied around the outer edge to hide the fact that the seam was not fitting properly against the body. This installation was done by FR when the unit was made. In order to repair it, it has to be broken free from the body and re-attached. We had the window checked for leaks and at present there are none. We are considering our options as to whether we repair now or repair later.