Is it a Unicode Font?
To determine if your font is Unicode-compliant, with all its characters coded and mapped correctly, choose the Font in any program (or in Font Book, set the preview area to Custom (Preview > Custom), and type Option-Shift-2.
If you get a euro character (a sort of uppercase C with two horizontal lines through its midsection), it's 99.9 percent certain the font is Unicode-compliant. If you get a graphic character that's gray rounded-rectangle frame with a euro character inside it, the font is definitely not Unicode-compliant. (The fact that the image has a euro sign in it is only coincidental: it's the image used for any missing currency sign.)
This assumes that you're using U.S. input keyboard, which is a little ironic when the euro symbol is the test. With the British keyboard, for instance, Option-2 produces the euro symbol if it's part of the font.
Check out the perks at <http://tidbits.com/member_benefits.html>
Special thanks to Irving Silver, Bradley Stearns, Shawn Medero, and
Kirk Godtfredsen for their generous support!
Note that if you haven’t opened Firefox in awhile and allowed the automatic updates to be applied, you’ll have to go through multiple updates to get to Firefox 18 (our version needed to first jump from 16.0.1 to 17.0.1 and then to 18).
I'm not sure I've actually used Firefox other than to check a Website in about two years . . .
I use this a lot to search TidBITS, Amazon, and Google (since I have the omnibox set to do Google Browse By Name, per http://tidbits.com/article/12099 )
I shudder to think what will happen when Firefox reaches drinking age!