MS_NONSQUARE doesn't always work

[akrherz@…]

I've been trying to get MS_NONSQUARE to work this evening and have encountered
some strange behaviour.  This may be related to bug

http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=998

1. I set CONFIG MS_NONSQUARE YES in the mapfile
2. I set an EXTENT which is not square with the image size selected
3. Make map with PHP -> square pixels
   Make map with shp2imp -> non-square
   Make map with CGI mapserv and no BBOX specified -> square
   Make map with CGI and BBOX specified -> non-square

I would like non-square for all of the above :)  thanks!