Hey Sean, you can force PS to rebuild the "font list" if you think it might have been corrupted. As to the font limit (number of fonts read by PS before crapping out) you'd have to ask Hoof, he's the "font-a-holic" ;)

...to force Photoshop to rebuild it's font list, search your drive for adobefnt.lst and delete it.

you've been having probs with fonts & PS for some time now... dating back to last year... holy crap batman ;)

:)
retrocity