highlighted charactor with "(show-parent-style 'expression)" still remains
after moving cursol.

i wrote following .emacs setting:
;----------------------------------------------------
; displaysize
(setq initial-frame-alist
     (append '((top . 40)
(left . 45)
(width . 40)
(height . 35)) initial-frame-alist))

; parent highlight
(show-paren-mode t)
(setq show-paren-style 'expression)
(set-face-background 'show-paren-match-face "PaleTurquoise")
(set-face-foreground 'show-paren-match-face "SteelBlue")
(set-face-underline-p 'show-paren-match-face t)

; remove startup message
(setq inhibit-startup-message t)
;----------------------------------------------------
and restarted emacs.
like "$emacs ~/.emacs".

when i move the cursol to the end of long line such as
'(set-face-background 'show-paren-match-face "PaleTurquoise")',
then the end of highlight charactor still remain after moving cursol to the
other line.
emacs shows the line such as '(set-face-background 'show-paren-match-face
"PaleTurquoise")Pa'.
'Pa' is highlighted charactor after moving cursol.


is it bug? or my .emacs setting is bad?


---my enviroment---
GNU Emacs 23.1.1 (i used apt-get command to get emacs)
ubuntu 10.10
-------------------

Best regards.