Problem with new display in buffer-menu command

[kevin.gal]

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the address@hidden mailing list.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

In the buffer-menu display, long file names are now truncated
(indicated by a ":").  Since the display lines are not wrapped, as
well, this can result in a display looking like this:

.   viper-keys-new-test-c:   6  C++/lah                   
~/usr/local/share/emacs/22.0.91/lisp/emulation/v
    viper-keys-new-test-c:   6  C++/lah                   
~/usr/local/share/emacs/22.0.91/lisp/emulation/v
 %* emulation             4097  Dired by name     
~/usr/local/share/emacs/22.0.91/lisp/emulation/
 %  lisp                 39305  Dired by name     
~/usr/local/share/emacs/22.0.91/lisp/
 %  22.0.91                436  Dired by name     
~/usr/local/share/emacs/22.0.91/
 %  emacs                  305  Dired by name     ~/usr/local/share/emacs/
 %  share                  229  Dired by name     ~/usr/local/share/
 %  local                  666  Dired by name     ~/usr/local/
 %  usr                    217  Dired by name     ~/usr/
 %  ~                     6854  Dired by name     ~/
    *scratch*                0  Lisp Interaction
  * *Messages*            1597  Fundamental
 %  *Completions*          235  Completion List

One of the two top files ends in .h file and the other ends in .cpp,
but the user cannot tell which is which from this display without
first visiting one.  Normally, one would expect the full filename to
appear when moving the mouse over the truncated filename.  But,
instead, the message "mouse-1: select this buffer" is always
displayed, instead, which isn't helpful in this situation.

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/users/gallagk/usr/local/share/emacs/22.0.91/etc/DEBUG for instructions.


In GNU Emacs 22.0.91.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2006-11-20 on houfcs4
X server distributor `AT&T Laboratories Cambridge', version 11.0.3332
configured using `configure '--prefix=/users/gallagk/usr/local''

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: C
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Buffer Menu

Minor modes in effect:
  shell-dirtrack-mode: t
  show-paren-mode: t
  display-time-mode: t
  tooltip-mode: t
  tool-bar-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
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<pause> b p p p p p p p p p p p SPC p p d d x f <right> 
R v i p e r - k e y s <tab> <backspace> <backspace> 
c p p <return> SPC R v i p e r - k e y <tab> s <tab> 
<backspace> <backspace> <backspace> h <return> o <pause> 
<kp-divide> p f <pause> 1 <pause> b SPC SPC f <pause> 
b SPC p <down-mouse-1> <mouse-movement> <mouse-movement> 
<drag-mouse-1> <down-mouse-1> <mouse-1> <escape> x 
e m a <backspace> <backspace> <backspace> r e p o r 
t SPC e m SPC SPC <return>

Recent messages:
Loading emacsbug...done
Quit
Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %; q to quit; ? for help.
Move: 1 of 1
Move: 1 file
Making completion list...
Move: 1 of 1
Move: 1 file
Loading cc-mode...done
Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %; q to quit; ? for help. [2 times]