I've had this problem since I moved up to 10.6
I validate fonts w/Font Book. I get the list of fonts with errors. But when I click Remove, they're not removed. If I validate again, the duplicates still exist.
In the past, I went through folders where I found fonts, then moved them to a separate folder in my Documents folder, but I don't want to do that again, considering I didn't really know what I was doing. I don't want the system to add fonts wherever it finds them.
I wondered if there is a program or a method to make this job easier.
I remember when font handling was something Apple was proud of. It's more complicated than OS 9.
Recently I re-installed 10.6.3 and I'm not sure what to do.