display problem with emacs 21.3 in windows xp

[martin . weg]

Hello

I have a problem with GNU Emacs (downloaded from 
ftp://ftp.gnu.org/gnu/emacs/windows/) on my Windows machine (dual xeon, 2G 
memory, Matrox Millennium G450 DVI; Windows XP Professional SP 2) .

After some hours (or even days) of work with emacs it suddenly starts to 
display all modifications to the display relative to the upper left corner of 
the physical screen, not inside the window (in the sense of "emacs window" if I 
have more than one) as expected.

If I save all buffers and restart Emacs (I do not log off or reboot) it works 
well again for some hours, so the problem is not too severe.

Is this a known problem with Emacs 21.3? Or is it more probable the Matrox 
display driver is buggy? Or is it an issue of the Windows display manager?

Regards,
Martin Weg
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