Display of no break spaces

[Pascal Quesseveur <pascal.quesseveur@free.fr>]

Hello,

I don't understand the mechanism used to display no break
spaces. The character is displayed as a big box with what looks
like small numbers inside. My config is the following:

GNU Emacs 24.2.1 (i386-mingw-nt6.1.7600) of 2012-08-29 on MARVIN
default font is -outline-consolas-normal-r-*-*-*-90-*-*-c-*-*

Here is the ouput of F1-v nobreak-char-display:

nobreak-char-display is a variable defined in `C source code'.
Its value is t

And here is the output of describe-char on a no break space:

--8<---------------cut here---------------start------------->8---
             position: 223 of 305 (73%), column: 0
            character:   (displayed as  ) (codepoint 160, #o240, #xa0)
    preferred charset: iso-8859-1 (Latin-1 (ISO/IEC 8859-1))
code point in charset: 0xA0
               syntax: . 	which means: punctuation
             category: .:Base, b:Arabic, j:Japanese, l:Latin
          buffer code: #xC2 #xA0
            file code: #xA0 (encoded by coding system iso-latin-1-dos)
              display: by display table entry [?􀂷] (see below)

The display table entry is displayed by these fonts (glyph codes):
􀂷: -- no font --
 face: `link'

Character code properties: customize what to show
  name: NO-BREAK SPACE
  old-name: NON-BREAKING SPACE
  general-category: Zs (Separator, Space)
  decomposition: (noBreak 32) (noBreak ' ')

There are text properties here:
  fontified            t
--8<---------------cut here---------------end--------------->8---


I don't understand why the no break space is displayed using link
face. What can I do to change the way it is displayed?

-- 
Pascal Quesseveur
pascal.quesseveur@free.fr