bug#11629: 24.1.50; Graphical Corruption

[Simon Morgan]

After starting an Emacs session and using it for a while I'll move the
cursor and it'll leave a "ghost trail" of it behind. Also, if the buffer
scrolls down, half the screen will be ghosted as well. This continues
until I force a refresh of the window by e.g. minimizing and restoring
the Emacs window.

I've uploaded a screenshot of the phenomenon to:

http://i.imgur.com/DMxyn.png


In GNU Emacs 24.1.50.1 (i386-mingw-nt6.1.7601)
 of 2012-05-28 on MARVIN
Bzr revision: 108403 monnier@iro.umontreal.ca-20120528034218-zugrj2n73izlkp5a
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
 `configure --with-gcc (4.6) --no-opt --enable-checking --cflags
 -ID:/devel/emacs/libs/libXpm-3.5.8/include
 -ID:/devel/emacs/libs/libXpm-3.5.8/src
 -ID:/devel/emacs/libs/libpng-dev_1.4.3-1/include
 -ID:/devel/emacs/libs/zlib-dev_1.2.5-2/include
 -ID:/devel/emacs/libs/giflib-4.1.4-1/include
 -ID:/devel/emacs/libs/jpeg-6b-4/include
 -ID:/devel/emacs/libs/tiff-3.8.2-1/include
 -ID:/devel/emacs/libs/gnutls-3.0.9/include
 -ID:/devel/emacs/libs/libiconv-1.13.1-1-dev/include
 -ID:/devel/emacs/libs/libxml2-2.7.8/include/libxml2'

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: ENG
  value of $XMODIFIERS: nil
  locale-coding-system: cp1252
  default enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
  paredit-mode: t
  rainbow-delimiters-mode: t
  show-paren-mode: t
  desktop-save-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-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:
<up> <up> <down> <down> <tab> C-u <next> <next> <next> 
<prior> <prior> <prior> <prior> <prior> C-x C-b <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<next> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <return> 
<home> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <delete> <tab> C-u C-u M-; C-u 
<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> M-; C-u <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <down> ; C-x C-s <next> <next> 
<prior> <prior> <prior> <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> <delete> 
<tab> C-u M-x l i s t <backspace> p - i n d e <tab> 
<return> u C-u C-u M-x c o n <backspace> <backspace> 
u s t o m i <tab> - g <tab> <return> i n d e <tab> 
<tab> <return> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <up> <up> <return> 
C-x k <return> M-; C-u <left> <down> <down> <home> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> M-x b u g <tab> <tab> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> r e p o <tab> r 
<tab> <return>

Recent messages:
Creating customization items...
Creating group...
Creating group entries...done
Creating customization items ...done
Resetting customization items...done
Creating customization setup...done
Auto-saving...done
Undo!
Auto-saving...done
Making completion list... [2 times]

Load-path shadows:
~/.emacs.d/bs hides c:/emacs/lisp/bs

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
mail-prsvr mail-utils help-mode view cus-edit easymenu cus-start
cus-load wid-edit vc-git deeper-blue-theme scala-mode-auto clojure-mode
rx bs paredit rainbow-delimiters easy-mmode cl edmacro kmacro paren
desktop time-date tooltip ediff-hook vc-hooks lisp-float-type mwheel
dos-w32 disp-table ls-lisp w32-win w32-vars tool-bar dnd fontset image
regexp-opt fringe tabulated-list newcomment lisp-mode register page
menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core frame cham georgian utf-8-lang misc-lang
vietnamese tibetan thai tai-viet lao korean japanese hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer button
faces cus-face files text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget hashtable-print-readable backquote
make-network-process multi-tty emacs)