210914 Neil Bothwick wrote:
> On Tue, 14 Sep 2021 01:07:42 -0400, Philip Webb wrote:
>> So I can avoid the problem either by cropping only with Fotoxx
>> or by renaming them whenever I do it with Gwenview
>> or by converting PNGs to JPGs before cropping them.
> The latter will result in loss of information.

Ok if the info is irrelevant or otiose.

>> The bad case does look like a Gwenview bug,
>> but KDE bugs tend to disappear into the ocean, if reported.
> It sounds like the images are fine, just that Gwenview is displaying
> with the wrong colour information.  The question then becomes
> does Gwenview save the colour information in the image file or separately.
> If you do have another user set up,
> you could try cropping and saving as one user and viewing as the other.
> If the second user sees the image as it should be,
> it is the latter and you can locate and remove that information.

That's all very complex & far more work than I care to spend time on.
I believe I've found a solution as above.

> It does seems to be a bug, and one that has been around for some years:
> https://forum.kde.org/viewtopic.php?f=66&t=139430

Yet another eg of KDE's cavalier approach to bugs.

Thanks for the insights.

> And then Adam said, "What's a headache ? "

He should have said : "What's an apple ? "

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