convert no longer respects -density?

Hello all,

Until recently, I've been using

  convert --density=150 something.svg something.png

to convert SVG files to PNG at 150dpi. After some recent upgrade, I'm
afraid I can't recall exactly which, this stopped working.

$ convert --version
Version: ImageMagick 6.5.6-1 2009-09-16 Q16 OpenMP http://www.imagemagick.org
Copyright: Copyright (C) 1999-2009 ImageMagick Studio LLC

Convert seems to ignore the density setting entirely and always
produces a 72dpi PNG file.

I'm running the MacPorts version of ImageMagic; initially, I imagined
that this was some sort of configuration bug:

https://trac.macports.org/ticket/21420

But they've suggested that I should report the bug upstream.
Suggestions or comments, most welcome.

                                        Be seeing you,
                                          norm

-- 
Norman Walsh <[email protected]> | All the labors of the ages, all the
http://nwalsh.com/            | devotion, all the inspiration, all the
                              | noonday brightness of human genius, are
                              | destined to extinction.--Bertrand
                              | Russell