Are you using Illustrator CS2? Illustrator has it's own font folder. Have a look in there (Applications>Illustrator>Fonts)
Can't have enough font folders
Allen
Sorry, I can't think what the problem is.
I have a vague recollection of having problems getting Font Book to recognise certain fonts when it was first introduced with OS X - particularly with Helvetica for some reason which was very annoying.
Are you installing the entire font family or just the one variant, i.e. Bold.
I have News Gothic here, the Linotype-Hell cut, Postscript Type 1. It's not giving me any problems.
One other possibility is that Font Book's font cache is corrupt or "unhappy" as we sometimes say at work. It won't affect the font from being used by things other than whatever program has the bad cache. We get this a lot with Quark when we have to install new fonts on our older systems.
If you aren't deep into work, you can try Font Nuke which is a free utility to clear out all your font caches system wide. They get automatically rebuilt upon restart or when you open an application again so there's no serious harm in doing this. However, as with anything that modifies your working environment, I'd recommend you get things done you have to do first while things are still functional before trying any fixes. I've never had a problem using this utility and have used it quite a bit on multiple systems, but that doesn't mean that something couldn't happen to someone eventually. Don't want to get stuck unable to finish your job because of something you tried to fix.
One other possibility is that Font Book's font cache is corrupt or "unhappy" as we sometimes say at work. It won't affect the font from being used by things other than whatever program has the bad cache. We get this a lot with Quark when we have to install new fonts on our older systems.
If you aren't deep into work, you can try Font Nuke which is a free utility to clear out all your font caches system wide. They get automatically rebuilt upon restart or when you open an application again so there's no serious harm in doing this. However, as with anything that modifies your working environment, I'd recommend you get things done you have to do first while things are still functional before trying any fixes. I've never had a problem using this utility and have used it quite a bit on multiple systems, but that doesn't mean that something couldn't happen to someone eventually. Don't want to get stuck unable to finish your job because of something you tried to fix.
I work in a print shop where I am constantly going between Quark and InDesign and if not for FontNuke I would have gone mental in my first few months. For some reason the font caches between those two and Font Book (and sometimes MS Office as well) just don't get along and when you add something one will update and the others get screwy. There's generally no harm in clearing them since they rebuild as needed, just nice to have an app do all the hard work of locating all of them for you!