The resolution option in the PDF export page is not for embedded bitmaps but for filters, and thus won't change the way your imported images are exported to PDF.
Unfortunately, changing the bitmap resolution when importing images is not very easy with 0.48.x versions (see http://wiki.inkscape.org/wiki/index.php/FAQ#Why_do_images_.27grow.27_when_imported_into_Inkscape.3F). But it's going to be fixed in the next release (0.91) currently in progress (see https://bugs.launchpad.net/inkscape/+bug/165952), that will allow you to choose the bitmap import resolution.
The resolution option in the PDF export page is not for embedded bitmaps but for filters, and thus won't change the way your imported images are exported to PDF.
Unfortunately, changing the bitmap resolution when importing images is not very easy with 0.48.x versions (see http:// wiki.inkscape. org/wiki/ index.php/ FAQ#Why_ do_images_ .27grow. 27_when_ imported_ into_Inkscape. 3F). /bugs.launchpad .net/inkscape/ +bug/165952), that will allow you to choose the bitmap import resolution.
But it's going to be fixed in the next release (0.91) currently in progress (see https:/