With Firefox I always get the code inside the box. I checked three fonts with Firefox and got the same display. With IE I got a empty box of a different shape.
Mac OS X.5.8, Firefox 3.5.5; I see boxes with the Unicode hex values inside.
That’s a clever feature Firefox added: even if your computer can’t display a character, you can (with good eyesight) read the hex code and find out what it’s supposed to be.
Not that I know of. I never did anything to install it but one never knows what goodies are hidden away in a Linux distro. Is there some way I can tell?
I’ve got no clue about how to check fonts in Linux. But I bet it is there--or another font that supports a wider range of Unicode than is normally the case.