I was dreading this!
Hi,
A bit after the fact but I just loaded about a thousand fonts into fontbook and have been having problems ever since.
Mail and Safari are refusing to render Helvetica or Times correctly, opting instead, to provide an intriguing display consisting of numerical fractions crammed together.
This is not consistent and changes from line to line. ie, Three or four lines will be ok, but there will be one in the middle that is munted.
The only other app that seems to be affected is NoteBook (circus ponies). You can copy the munted text from one app then paste it into textwrangler (barebones) and it will be fine??? Sheesh, I've spent a few hours trying to nut it out but I can't seem to grasp the logic of it. I don't think I can be bothered with anything other than the Archive and Install suggested by Mad Jew. A pity to do this with a two week old SR MBP!