Viewing page with linked image causes file to be marked as dirty (needs saving)
InDesign version: 15.1.1
Additional versions tried: 15.0.3, 15.0, 14.0.3
MacOS Mojave (10.14.6) on two different computers
1. Create a new empty document.
2. Add a second page to the document.
3. Place Image, onto the page you're viewing (I did a PNG)
4. Save and close the document.
5. Open the document.
6. Wait 2-20 seconds, doing nothing to change the document.
Expected result: document opens to page with placed image, nothing else happens / changes.
Actual result: document opens to page with placed image, and after a delay the document is marked as changed (asterisk appears in tab before the filename, InDesign prompts to save document when you close it)
Additional detail: It seems to key off of viewing the page with the linked image, not just opening the file. If you save the document while viewing the page without the image, then when you re-open it (and see the imageless page) the file is not marked be as dirty even if you wait. However, if you then go to the page with the linked image (by clicking, scrolling, or command-J), shortly after you get there the file will be marked as dirty. (If you scroll, the key event seems to be hitting the boundary to the new page; the linked image does not need to actually be displayed.)
Attempted fixes which did not resolve the problem:
• Deleting my InDesign preferences (by holding down CTL-CMD-OPT-SHIFT during program startup)
• Deleting my Cache
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Adobe InDesign team
Eric R commented
More detail on pixels/inch:
1. From the linked community thread, from someone else who reproduced:
"In my tests, I started with a transparent .psd (which is what I would normally use), then this morning used Photoshop's File > Export > Quick Export as PNG (72 ppi/225 ppi) and finally used File > Export > Export as and exported 2x the original size (72 ppi/450 ppi)—that's what did it."
2. If I use Photoshop to create two single-pixel documents, one with Resolution of 72 px/inch (set in the New Document dialog) and the other of 73, then save each as PNG, the first doesn't trigger the behavior while the 2nd does.
Eric R commented
Did more testing - confirmed that I'm only seeing it with PNG files, and only where pixels/inch is set to higher than 72. (More details on factors that didn't prove relevant in the thread Uwe Laubender linked to.)
To the developers:
Also see into this Adobe InDesign Forum thread:
Viewing page with placed image causes document to be marked as dirty (needs saving)?
Eric_R1 , Jul 07, 2020
( ACP )
Well, it does happen with a placed PNG with transparency.
It will not happen with a placed TIFF 1-Bit without any transparency.
Seems the cause is the kind of image or transparency. Or both.
Will test on with other image types.
( ACP )
I can see this as well. Voted for fixing the issue.
My placed image was a PNG file with transparency (if that matters).
I'm on Windows 10 and tested with the German versions of InDesign 2020 and 2019.
( ACP )