Try validating your fonts.
How to use Font Book to validate fonts
* 1. Open Font Book in your Applications folder.
* 2. Select All Fonts.
* 3. Now click in the list of fonts and select all (Edit > Select All).
* 4. Under File in the Menu bar, select Validate Fonts.
* 5. Duplicate fonts will be marked with either the yellow badge or a black dot.
* 6. Select to remove or delete duplicates.*
* 7. Delete font caches (how to)
* 8. Restart your computer
* Step 6 remove or delete duplicates is where the tricky part comes in. You can select to let Font Book disable or remove duplicates, but Ive found that it removes the one you have not been using rather than selecting the best option. See Font Management in OS X, by Kurt Lang, for more info on fonts.
http://www.jklstudios.com/misc/osxfonts.html
*
See Kurt Lang's directions here to remove font caches
https://discussions.apple.com/message/26188553#26188553