23.0.60;show-paren-mode causes abnormal vertical lines on Win32.

[????]

testcase:
()
^
point
Your point is on the open paren. Emacs highlights the open and close
parens. If you try to input letters now, some letters will begin with
a abnormal vertical line, especial for letters 'f' and 'm'. The lines
have the save color as the background of the highlighted paren.





In GNU Emacs 23.0.60.1 (i386-mingw-nt5.1.2600)
 of 2008-02-14 on WASP-8DB7BB213F
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4)'

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: zh_CN
  value of $XMODIFIERS: nil
  locale-coding-system: cp936
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  show-paren-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-compression-mode: t
  line-number-mode: t

Recent input:
M-x b u g SPC r <backspace> <backspace> <backspace> 
<backspace> r e p o r SPC b u SPC <backspace> = <backspace> 
<backspace> e SPC SPC <return>

Recent messages:
Warning: Default coding system `chinese-iso-8bit' disagrees with
system codeset `cp936' for this locale.
Loading 
e:/emacs23/site-lisp/color-theme-el/themes/color-theme-autoloads.elc...done
Loading e:/emacs23/site-lisp/color-theme-el/themes/color-theme-example.el 
(source)...done
Loading 
e:/emacs23/site-lisp/color-theme-el/themes/color-theme-example.elc...done
Loading e:/emacs23/site-lisp/color-theme-el/themes/color-theme-library.el 
(source)...done
Loading 
e:/emacs23/site-lisp/color-theme-el/themes/color-theme-library.elc...done
Loading e:/emacs23/site-lisp/color-theme-el/themes/color-theme.elc...done
For information about GNU Emacs and the GNU system, type C-h C-a.