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In Lightroom 5.7.1 (OSX 10.10), Lightroom is showing a weird, corrupted version of many JPG (not raw) files in my library:

enter image description here

Opening or previewing the image directly (Quicklook or any other app) shows that the image is just fine:

enter image description here

This is happening only to some folders (but many of them), and is progressive - as I open an old folder, it will re-render the original previews and change from the original, good preview, to the corrupted version.

Selecting 'develop' still shows the corrupted image, too.

Discarding the 1:1 previews has no effect.

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  • Related:Why are my RAW images corrupt but the previews okay? – Michael C Jul 11 '17 at 12:38
  • Is that in LR a raw? Because the second screen shot is a jpeg, ie. a different file? – ths Jul 11 '17 at 21:33
  • The original is a JPG file, not raw! – Simbamangu Jul 12 '17 at 7:46
  • As you can see, the color layer is correct, but the luminance layer is incorrect for the width part, and correct for the height part. This is usually a wrong implementation of the file reader, or at least a wrong information about the stride used to read the data, which is in your case half of the correct value. I would recommend to reinstall Lightroom. Which other imaging software do you have ? They might share libraries (dylib files), and one of them updated those but compatibility has been broken. – Soleil - Mathieu Prévot Dec 9 '17 at 14:36
  • Beside the stride problem, can you try to purge the cache to update from the original, even though it's JPG images ? Edit / Preferences / Performance / Purge cache (there are 2 of them). – Soleil - Mathieu Prévot Dec 9 '17 at 14:41
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It seems to be corrupted raw files.

Generally the normal software will show you the embedded JPEG in the raw (a small file), Lightroom, Photoshop, DXO, Capture One and others read the RAW.

I'm quite sure you transfer yours raws directly from your camera.

Try to transfer your files from your camera with a (different) card reader. Check if you don't have any memory problem. A good way to check transfer is to compare checksum files from the source to the target.

Perhaps your card is corrupted or damaged or it is a "fake" one, format it in your camera with low level formating procedure.

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  • I've edited my original post to confirm that it's happening to JPG files, not raw. These are files that have been happily and correctly in my Lightroom catalog for a long time, and are now getting updated to appear in both the viewer and develop tabs as those corrupted images. The original image on disk is just fine if viewed in Graphicconverter or Preview! – Simbamangu Jul 12 '17 at 7:50

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