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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: [QUESTION] why there is a horizontal line in middle of
 text-property displayed image?
Date: Mon, 12 Sep 2022 19:46:49 +0300
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> From: "Christopher M. Miles" <numbchild@gmail.com>
> Date: Mon, 12 Sep 2022 08:54:11 +0800
> 
> Question: As the email subject said.

Does this happen with any image file?  If not, can you post the file
with which it happens, or tell where one can download it?

If it happens with any image file, does it happen in "emacs -Q"?

I tried to reproduce this with some random image file, but didn't see
any such center-line.