Openoffice fullscreen problem

I have the problem with the simpress full screen in OpenOffice (presentation module). 

When I click "full screen" in OpenOffice, I get an image aligned at the bottom left corner, with the size of the original simpress window. See :
http://perso.wanadoo.fr/olivier.castany/OOFullScreen1.png
http://perso.wanadoo.fr/olivier.castany/OOFullScreen2.png

Is there a workaround ?

I searched the list, and found no real answer.
I tried with WindowMaker-0.91.0.tar.gz and WindowMaker-CVS-20050409.tar.gz

(PS : The full screen works with Gnome.)

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