librsvg-2.13.91 from Gentoo's GNOME 2.14 overlay:

Trying to convert with specified height just gives usage message:

$ rsvg -h 32 file.svg file.png
Usage: rsvg [OPTIONS...] file.svg file.png
  -d, --dpi-x=<float>          pixels per inch
  -p, --dpi-y=<float>          pixels per inch
  -x, --x-zoom=<float>         x zoom factor
  -y, --y-zoom=<float>         y zoom factor
  -w, --width=<int>            width
  -h, --height=<int>           height
  -q, --quality=<int>          JPEG quality
  -f, --format=[png, jpeg]     save format
  -v, --version                show version information

Help options:
  -?, --help                   Show this help message
  --usage                      Display brief usage message

http://bugzilla.gnome.org/show_bug.cgi?id=329997

Index: rsvg.in
===================================================================
RCS file: /cvs/gnome/librsvg/rsvg.in,v
retrieving revision 1.1
diff -u -B -p -r1.1 rsvg.in
--- rsvg.in	10 Dec 2005 18:00:41 -0000	1.1
+++ rsvg.in	5 Feb 2006 13:07:08 -0000
@@ -46,7 +46,7 @@ def main():
         elif o in ("--usage"):
             usage()
             sys.exit(0)
-        elif o in ("-h", "--help"):
+        elif o in ("-?", "--help"):
             help()
             sys.exit(0)
         elif (o in ("-f", "--format")):