[Inkscape-user] A problem about the PNG export

Hi all,

just a little problem about the PNG export :

the SVG src : http://florentgabriel.ouvaton.org/temporaire/Verre.svg

and the smally generated PNG : http://florentgabriel.ouvaton.org/temporaire/Verre.svg.png

There is a problem with the stroke of the glass: at this small size, it seems to be less black than the parasol's stroke...

Does anyone know a way to solve this problem ?

Florent