[Freetype] .pfb font screwyness...

[Pedriana, Paul]

Perhaps this has been fixed in some recent Freetype update, but...

I load a .pfb font (from ITC called "Arta Book") and then call:
   FT_Set_Pixel_Sizes(face, 9, 9);

After doing this I get:
   face->units_per_EM            = 1000
   face->ascender                = 921
   face->descender               = -250
   face->height                  = 1405
   face->size->metrics.x_ppem    = 9
   face->size->metrics.y_ppem    = 9
   face->size->metrics.x_scale   = 37749
   face->size->metrics.x_scale   = 37749
   face->size->metrics.ascender  = 512
   face->size->metrics.descender = -128
   face->size->metrics.height    = 832
   face->bbox.xMin               = -6225920    <----- ???
   face->bbox.yMin               = -16384000   <----- ???
   face->bbox.xMax               = 72548352    <----- ???
   face->bbox.yMax               = 60358656    <----- ???

I don't understand the bbox values. Why are they so large? 
I thought they were supposed to be in font units. Based on 
the Freetype documentation and based on what I get when using
the TrueType version of this font, I expect values to be 
something like:
   face->bbox.yMax ~= face->height

I stepped into the T1_Init_Face() function and found this (some blank lines
removed):
   root->bbox = face->type1.font_bbox;
   if ( !root->units_per_EM )
      root->units_per_EM = 1000;
   root->ascender  = (FT_Short)( face->type1.font_bbox.yMax >> 16 );
   root->descender = (FT_Short)( face->type1.font_bbox.yMin >> 16 );

This is saying that the bbox data is in 16.16 format and not
in font units as the Freetype documentation says it should be.
This suggests that there is a bug somewhere. To be consistent
with the documentation, this code should be dividing the bbox
values by 65536 before returning to the caller. The fact that
the TrueType driver and the Type1 driver act differently suggests
to me that I'm misinformed or there is a bug somewhere.

Let me quote the documentation:
  /*    bbox :: The font bounding box.  Coordinates are     */
  /*            expressed in font units (see units_per_EM). */   <----- Here
  /*            The box is large enough to contain any      */
  /*            glyph from the font.  Thus, bbox.yMax can   */
  /*            be seen as the `maximal ascender',          */
  /*            bbox.yMin as the `minimal descender', and   */
  /*            the maximal glyph width is given by         */
  /*            `bbox.xMax-bbox.xMin' (not to be confused   */
  /*            with the maximal _advance_width_).  Only    */
  /*            relevant for scalable formats.              */

What should I do? 

Paul