LyX/Mac: Palatino Screen Font Missing

[Bruce Pourciau]

Have just upgraded my Mac and LyX (to 1.5.6). A hoard of fonts show up  
in the list of available _screen_ fonts, but for some reason not  
Palatino. Palatino show up in the font lists for Word and Nisus, and  
my LyX produced pdf's are generated in Palatino. Any thoughts?

Bruce