SERIOUS Win32 21.2 redisplay bug

[Jari Aalto+mail.emacs]

In GNU Emacs 21.2.1 (i386-msvc-nt5.0.2195)
 of 2002-03-19 on buffy
configured using `configure --with-msvc (12.00)'
Important settings:
  value of $LC_ALL: en_US.iso88591
  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
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

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

Win32 version of 21.2 has a serious redisplay bug, which makes Emacs
completely unusable (all things hang for a period of time, until 
mouse is waved somehow while prompting, scrolling etc.)

The bug can be demontrated simply setting

    (setq track-mouse t)

Do anything in Emacs: load a file, scroll up down, with wheel or
without, Try running ESC ESC : eval command or C-x C-f ... just do
anything for a while and the bug appears. 

    Especially C-xC-e lisp eval yields nothing

Upper frame title blinks rapidly and all stays still for a while.

Jari

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