Maniphest T386454

Gibberish rendering of text in PDF thumbnail
Open, Needs TriagePublicBUG REPORT
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Authored By

	Don-vip
	Feb 14 2025, 11:40 AM

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Referenced Files

	F58398535: image.png
	Feb 14 2025, 11:40 AM

	F58398530: image.png
	Feb 14 2025, 11:40 AM

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Description

Steps to replicate the issue (include links if applicable):

Browse to https://commons.wikimedia.org/wiki/File:ECDM_20250212_Ukraine-Moldova_DGECHO.pdf
Look at JPEG thumbnail: https://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/ECDM_20250212_Ukraine-Moldova_DGECHO.pdf/page1-1793px-ECDM_20250212_Ukraine-Moldova_DGECHO.pdf.jpg
Try to read text

What happens?:
The text is unreadable, all characters are switched to random ones:

image.png (1×1 px, 2 MB)

What should have happened instead?:

The text should be displayed as in Firefox when we display the PDF directly:

image.png (1×1 px, 646 KB)

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):
Firefox 135.0 / Ubuntu 24.04 LTS

Event Timeline

Don-vip created this task.Feb 14 2025, 11:40 AM

Restricted Application added subscribers: Base, Aklapper. · View Herald TranscriptFeb 14 2025, 11:40 AM

Aklapper removed a project: PDF-Rendering.Feb 14 2025, 12:23 PM

Another one: https://commons.wikimedia.org/wiki/File:ECDM_20250404_Ukraine_Moldova_ECHO(1).pdf

A new one: https://commons.wikimedia.org/wiki/File:ECDM_20250826_SAIO_Preparedness_actions.pdf

Another one: https://commons.wikimedia.org/wiki/File:ECDM_20251215_Mozambique_Complex_Crisis.pdf

Another one: https://commons.wikimedia.org/wiki/File:ECDM_20260109_Sudan_Conflict_and_pop_displ.pdf

Another one: https://commons.wikimedia.org/wiki/File:20260114_reliefEU_funding_2025_overview_DM(1).pdf