Thanks Jeremy.
My rendering options are set as you have suggested and I have
made sure everything is rendered correctly. As I went back over
the entire timeline I have noticed that the garbage mattes I
applied to video clips are doing the same thing. As the dissolves
take place there is a hard edge around the matte instead of a nice,
feathered soft edge. When I remove the dissolve and look at the
mattes the feathered edge looks perfect. It’s something about
the way the dissolve is working with the matte for some reason.
Mike Jensen