Unrecognized fonts with error -984 in Leopard

I’ve come across some fonts which worked in Mac OS X Tiger but don’t work in Leopard. They won’t load for me, even though the suitcase files — these are some old fonts — look good. The ones I’ve been able to run through verification in Font Book have passed. The suitcases themselves contain resource fork PostScript Type 1 fonts that I’ve carried with me like the uncertain digital baggage of youth, for many years.

I get a Font Book error -984 in my console log, when I examine the log, trying to load these fonts from my home directory. For example:

11/27/07 6:06:39 PM Font Book[5243] Could not create face from /Users/jaharmi/Library/Fonts/Officina Serif. Error -984.

I haven’t been able to find any useful reference to this error code yet, so my troubleshooting has been slowed.