OSX: anti-aliasing missing for some glyphs

[David Reitter]

I wonder why some glyphs are displayed in the wrong font, or at least  
without anti-aliasing, as evidenced by the below screenshot.
It seems to me like the routine that produces a fontset  (create- 
fontset-from-mac-roman-font) decides to include some standard (etl?)  
font for these characters, even though they are perfectly available  
from the correct font (or mac font family or whatever it is the  
system uses to normally display the characters).

I've had one report from a user saying that he couldn't display these  
characters at all - they only appear as boxes. It seems to me that  
the characters affected are just the ones that are displayed using  
the standard font without anti-aliasing. The user says that he can  
perfectly display these characters in other applications, so they  
must be available from the fonts. Since he tried out a variety of  
fontsets, it seems to be quite an issue...

The screenshot below shows croatian characters. Produce them by  
hitting the ] key (and neighbors) after M-x set-input-method croatian.

This happens on a CVS-derived, up-to-date Emacs on OS X 10.4.2.

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