scheme mode marginal comment delimiters on 8-colour ttys

[trentbuck@gmail.com]

On eight-colour ttys, comment bodies are not coloured; only the
comment delimiters are.  In Scheme mode, one writes something like

    ;;; commentary on next block
    ;; commentary on next line
    form                        ; commentary on current line

The semicolons of the first two lines are red, but the single semi on
the third line is not red.  C-u M-x what cursor position RET shows
that it is (incorrectly?) fontified with font-lock-comment-face,
whereas the other semis are fontified with
font-lock-comment-delimiter-face.

This symptom appears with the -Q switch.

In GNU Emacs 22.1.1 (x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2007-07-07 on nautilus, modified by Debian
configured using `configure  '--build=x86_64-linux-gnu' '--host=x86_64-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var/lib' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs22:/etc/emacs:/usr/local/share/emacs/22.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/22.1/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/22.1/leim' '--with-x=yes' '--with-x-toolkit=athena' '--with-toolkit-scroll-bars' 'build_alias=x86_64-linux-gnu' 'host_alias=x86_64-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: C
  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: en_AU.utf8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Major mode: Scheme

Minor modes in effect:
  encoded-kbd-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
ESC x r e o r t SPC DEL DEL DEL p o r t SPC e n SPC 
DEL m SPC b u SPC RET

Recent messages:
("emacs" "-Q" "tmp.scm")
Loading encoded-kb...done
For information about the GNU Project and its goals, type C-h C-p.
tmp.scm has auto save data; consider M-x recover-this-file
Loading scheme...done
Loading emacsbug...
Loading regexp-opt...done
Loading emacsbug...done