replacement character

[Matthias Clasen <mclasen redhat com>]

Hey, I have a question about 

U+FFFD REPLACEMENT CHARACTER

(The question came up in
http://bugzilla.gnome.org/show_bug.cgi?id=326747
if you are interested in context)

I wonder why some fonts have the glyph I would expect there, a question
mark on some dark background (Fixed), or just a black square (Console),
but most of the text fonts, in particular Bitstream Vera, have something
that looks similar to a cedilla or comma. Is that a traditional symbol
used to indicate unknown characters ? I would be much happier to have a
more questionmarkesque glyph in all fonts...


Matthias