Upgrade problems from 2.5.8 to anything higher

[Daniel Johnson]

Hello all --

I've been trying to keep up with the latest development versions, but 
I've run into a problem that's keeping me stuck at 2.5.8.  First of all, 
I'm running a fully-up-to-date Gentoo box, with AFPL Ghostscript 8.15.  
I've been able to use lilypond 2.5.8 just great, and I'm able to compile 
newer versions; but when I try to use them, the noteheads, clefs etc. in 
the output are all in Courier, i.e. Ghostscript isn't finding the 
Feta/Parmesan/Emmentaler fonts.  I've tried compiling on another machine 
and it works great there (with correct output); and I've packaged up the 
binary and installed it on this machine, but the output is still messed 
up.  There must be some old cruft sitting around on my machine gumming 
up the works, but I'm pulling my hair out trying to find it.  I've run 
the clean-fonts script, and carefully removed everything from 
/usr/share/lilypond, /usr/lib/lilypond and /usr/share/omf/lilypond 
between build attempts.  Anyone have any ideas what could be causing 
this problem?

I've pretty much ruled out fontforge and mftrace since these are invoked 
only during compile time, not runtime.

--Daniel