Oops, do we need a 13.5.4?
False color Thumbnails view in 13.5.3:
Correct view before:
Open in Image viewer looks fine.
Regards
Guido
JPEG developer
It's possible the bad thumbnails are cached from the previous version. Please try clearing the cache (Preferences / File Display Modes / Thumbnails / Performance) and then opening the folder in a new window.
If it's still wrong, would it be possible to zip one of the affected images and attach it here or via a private message?
Confirmed, it's an issue loading images from the cache (so clearing the cache would temporarily make it look like it was working, when in reality it wasn't).
And yes, we do need a 13.5.4 
Immediately after clearing the cache the display is fine.
But in review after changing folders the false colors appear again in most thumbnail images.
Which items are affected or not seams rather randomly, I can't see a rule.
See the two test folders here:
https://ijg.org/test/
https://ijg.org/test/KodakBGYCC_KodakSuite.zip
KodakSuite seem all false after review (from cache), KodakBGYCC only some of them, sometimes only the first, currently only 1., 2., 4., 5.. Image and compression configuration is the same per folder.
Never seen this before. Strange, I think you should find it.
Regards
Guido
JPEG developer
Thanks Jon. 13.5.4 looking OK now.
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