I've got a MapPoint image on a web page, overlaid with a translucent image served up by MapInfo's MapXtreme.

As I pan, the countries in the MapPoint image "curl away" at the edges, as if they were on the surface of a globe (funny that). But the countries in the MapInfo image retain their shape - as if the world was flat.

I would have thought that with each image sharing the same projection they would behave the same way. Any ideas?