Fontsets in LaTeX buffer with AUCTeX 11.55 don't work correct with umlauts or accents

[Peter Dyballa]

Hello!

The buffer is according its modeline ("-0:--") in ISO Latin-15. It is 
using fontfaces to display different text settings in LaTeX, but does a 
bad job for German umlauts and French accents:

C-u C-x = gives these explanations for normal text as in "Darüber":

          character: r (0162, 114, 0x72, U+0072)
            charset: ascii (ASCII (ISO646 IRV))
         code point: 114
             syntax: w  which means: word
           category: a:ASCII   l:Latin
        buffer code: 0x72
          file code: 0x72 (encoded by coding system iso-latin-9-unix)
            display: by this font (glyph code)
	     
-B&H-LucidaTypewriter-Medium-R-Normal-Sans-10-100-75-75-M-60-ISO8859-1 
(0x72)
        
        There are text properties here:
          fontified            t
        
          character: ü (07574, 3964, 0xf7c, U+00FC)
	    charset: latin-iso8859-15 (Right-Hand Part of Latin Alphabet 9 
(ISO/IEC 8859-15): ISO-IR-203.)
         code point: 124
             syntax: w  which means: word
           category: l:Latin
        buffer code: 0x8E 0xFC
          file code: 0xFC (encoded by coding system iso-latin-9-unix)
            display: by this font (glyph code)
	     
-B&H-LucidaTypewriter-Medium-R-Normal-Sans-12-120-75-75-M-70-ISO8859-15 
(0xFC)
        
        There are text properties here:
          fontified            t

here for the bold and underlined "bedürfen":

          character: d (0144, 100, 0x64, U+0064)
            charset: ascii (ASCII (ISO646 IRV))
         code point: 100
             syntax: w  which means: word
           category: a:ASCII   l:Latin
        buffer code: 0x64
          file code: 0x64 (encoded by coding system iso-latin-9-unix)
            display: by this font (glyph code)
	     
-B&H-LucidaTypewriter-Bold-R-Normal-Sans-10-100-75-75-M-60-ISO8859-1 
(0x64)
        
        There is an overlay here:
         From 14 to 15
          face                 [flyspell-incorrect-face]
          evaporate            t
          flyspell-overlay     t
          mouse-face           highlight
          help-echo            "mouse-2: correct word at point"
          keymap               (keymap
         (27 keymap
             (9 . flyspell-auto-correct-word))
         (mouse-2 . flyspell-correct-word))
        
        There are text properties here:
          face                 [(font-latex-italic-face font-lock-type-face)]
          font-lock-multiline  t
          fontified            t
        
        
          character: ü (07574, 3964, 0xf7c, U+00FC)
	    charset: latin-iso8859-15 (Right-Hand Part of Latin Alphabet 9 
(ISO/IEC 8859-15): ISO-IR-203.)
         code point: 124
             syntax: w  which means: word
           category: l:Latin
        buffer code: 0x8E 0xFC
          file code: 0xFC (encoded by coding system iso-latin-9-unix)
            display: by this font (glyph code)
	     
-B&H-LucidaTypewriter-Medium-R-Normal-Sans-12-120-75-75-M-70-ISO8859-15 
(0xFC)
        
        There are text properties here:
          face                 [(font-latex-italic-face font-lock-type-face)]
          font-lock-multiline  t
          fontified            t

and here's finally the lone à:

          character: à  (07540, 3936, 0xf60, U+00E0)
	    charset: latin-iso8859-15 (Right-Hand Part of Latin Alphabet 9 
(ISO/IEC 8859-15): ISO-IR-203.)
         code point: 96
             syntax: w  which means: word
           category: l:Latin
        buffer code: 0x8E 0xE0
          file code: 0xE0 (encoded by coding system iso-latin-9-unix)
            display: by this font (glyph code)
	     
-B&H-LucidaTypewriter-Medium-R-Normal-Sans-12-120-75-75-M-70-ISO8859-15 
(0xE0)
        
        There are text properties here:
	  face                 [(font-latex-bold-face font-latex-italic-face 
font-lock-type-face)]
          font-lock-multiline  t
          fontified            t



In GNU Emacs 21.3.50.1 (powerpc-apple-darwin7.7.0, X toolkit, Xaw3d 
scroll bars)
 of 2005-01-17 on Latsche.local
Distributor `The XFree86 Project, Inc', version 11.0.40300000
configured using `configure '--prefix=/sw' '--without-carbon' 
'--with-x' '--without-gif' '--infodir=${prefix}/share/info' 
'--mandir=${prefix}/share/man' '--libexecdir=${prefix}/lib' 
'--with-x-toolkit=lucid' 'CPPFLAGS=-I/sw/include' 'LDFLAGS=-L/sw/lib''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: de_DE.UTF-8
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: de_DE.UTF-8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Major mode: Debugger

Minor modes in effect:
  auto-compression-mode: t
  mouse-sel-mode: t
  show-paren-mode: t
  desktop-save-mode: t
  display-time-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  column-number-mode: t
  line-number-mode: t

--
Greetings

  Pete

"Let's face it; we don't want a free market economy either."
        James Farley, president, Coca-Cola Export Corp., 1959