Below you will find a free maintenance update for FontDoctor (v7.5.1).
This update provides the following enhancements:

• Remodeled user interface optimized for Mac OS X 10.5 (Leopard)
• Simplified “Diagnosed Options” menu
• Cleans system font caches for Mac OS X 10.5 (Leopard)
• Also cleans font caches for major creative applications (CS3 and QXP7) and MS Office applications