Interesting. I just tried to open my Font Book and mine won't open at all (hence my Googling "Font Book Won't Open" -- which is how I found you).

I would have thought Font Book was a standalone app but this is a curious coincidence.

I did try a restart but it didn't help.

I hope you get a better response than mine.

How funny. Yeah mine is still down. i did put odd fonts into the library about a week ago but i dont know if that could be the case. i have no idea how to start it running again without buying it again and dont know if the program would be on my mac restore disks. ugh. let me know if you hear anything if you can