bug#1174: 23.0.60; Some UTF-8 mails displaying wrongly in Emacs 23

[Frank Schmitt <ich@frank-schmitt.net>]

Gnus in Emacs 23 displays some German umlauts incorrectly while Gnus
in Emacs 22 displays the same message correctly. It only happens when
my boss uses thunderbird to reply to my UTF-8 mails from Gnus.

In Emacs 23 in the mail from my boss I get
Char: � (4194300, #o17777774, #x3ffffc, raw-byte) point=212 of 461 (46%) column=4
and the character is displayed as \374
In an other UTF-8 mail written by me it is
Char: ü (252, #o374, #xfc, file ...) point=493 of 940 (52%) column=0


In Emacs 22 when I do C-x = on the same character in the mail from my
boss as above I get
Char: ü (2300, #o4374, #x8fc, file ...) point=212 of 461 (46%) column=4
and in the other mail
Char: ü (2300, #o4374, #x8fc, file ...) point=493 of 940 (52%) column=0

I could reproduce with CVS head from this evening, minimal .gnus just
specifying the select method and emacs -q.


In GNU Emacs 23.0.60.2 (i686-pc-linux-gnu, GTK+ Version 2.12.8)
 of 2008-10-15 on glasgow.frank-schmitt.net
Windowing system distributor `The X.Org Foundation', version 11.0.10300000
configured using `configure  '--prefix=/opt/emacs23''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  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
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Group

Minor modes in effect:
  gnus-undo-mode: t
  show-paren-mode: t
  delete-selection-mode: t
  pc-selection-mode: t
  recentf-mode: t
  iswitchb-mode: t
  shell-dirtrack-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<help-echo> M-x g n u s <return> <down> C-u 1 0 <return> 
<up> <up> <return> t <return> <return> <return> <return> 
<return> <return> <return> <return> <return> <return> 
<return> <return> <return> <return> <return> <return> 
<return> <return> <return> <return> <return> <return> 
<return> <return> <return> <return> <return> <return> 
<return> <return> <return> <return> <return> <return> 
<return> <return> <return> <return> <return> <return> 
<return> <return> <return> <return> <return> <return> 
<return> <return> <return> <return> <return> <return> 
<return> <return> <return> <return> <return> <down> 
<return> <down-mouse-1> <mouse-1> C-x = <help-echo> 
<help-echo> <help-echo> <down-mouse-2> <mouse-2> <help-echo> 
<down-mouse-1> <mouse-1> <right> <left> C-x = <help-echo> 
<down-mouse-1> <drag-mouse-1> <help-echo> <help-echo> 
<down-mouse-1> <mouse-1> <home> <S-end> <C-insert> 
<down> <home> <S-end> <C-insert> <help-echo> <down-mouse-1> 
<mouse-movement> <mouse-1> <help-echo> q <return> <return> 
SPC q L <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<down> <down> <down> <down> M-x e m a <tab> b u <tab> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> b u g <tab> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> r e p <tab> o <tab> 
r <tab> <return>

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