Fax compression in 6.0.8-3

I'm trying to convert a couple formats to TIFF for faxing using 
ImageMagick 6.0.8-3, and I can't seem to specify any compression types. 
For example:

$ convert -compress Fax -density 200x200 pdf:test.pdf tiff:test.tiff
$ identify -verbose test.tiff
Image: test.tiff
  Format: TIFF (Tagged Image File Format)
  Geometry: 1700x2200
  Class: DirectClass
  Colorspace: RGB
  Type: Palette
  Depth: 8 bits
  Endianess: MSB
[...]
  Rendering-intent: Undefined
  Resolution: 200x200
  Units: Undefined
  Filesize: 10.7mb
  Interlace: None
  Background Color: white
  Border Color: #DFDFDF
  Matte Color: grey74
  Dispose: Undefined
  Iterations: 0
  Compression: None
  Orientation: TopLeft
  Software: ImageMagick 6.0.8 10/01/04 Q16 http://www.imagemagick.org
  Document: test.tiff
  Comment:  Image generated by GPL Ghostscript (device=pnmraw)


The same command used to work in 5.5.x.  This is the first 6.0.x release 
I've tested.  I found a possibly-related issue described here:

http://studio.imagemagick.org/magick/viewtopic.php?t=2314

No luck with either PerlMagick or the convert binary.

Also having a separate PerlMagick order of operations problem with density 
settings.  The following code properly sets density in the output:

my $img = Image::Magick->new();
$img->Set(density => '200x200');
$img->BlobToImage($pdf);
$img->Write('tiff:testpl.tiff');

Setting the density anywhere after the BlobToImage call does nothing. 
This issue (or similar) was mentioned here:

http://studio.imagemagick.org/pipermail/magick-bugs/2004-August/001827.html

Any help on either point is appreciated; are these the same bugs?

-Rob