The closed rasteriser (T2K) isn't parsing the OTF/CFF topdict syntax for
supporting CID fonts, ie where there are private dictionaries.
This manifested as a problem correctly rendering an OTF font on Mac OS X.
It turned out that the glyphs were rendered incorrectly because needed subroutines
for rendering a number of glyphs were not found since the private dictionaries
had not been read.
In addition it appears that the function for reading BCD encoded values
(as per CFF Spec and looked at section 4 "Dict Data"'s
description of binary encoded decimal numbers) needs some work.

Also it was noted that some metrics heuristics looked at every glyph in the font.
Excessive for CJK fonts . .