Problems filling polygons and MapManager

I am having a problem with filled polygons and MapManager.  When I open the design (DGN) file the polygons fill ok, but when I start MapManager, some of the fill disappears.  I have tried to to recreate the feature and the same thing happens. 

I also have general problems importing polygons created in MapInfo Professional, especially if there is a space in the file name (or the file name possibly starts with a number).  I think this could have something to do with the way MapInfo handles these by putting an underscore as a space.  This also applies to referenced files.

 Cheers Ian