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SITE-971 mime types release note update re deployment #9776

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SITE-971 mime types release note update re deployment #9776

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mime types release note update re deployment
scottbuscemi Nov 17, 2025
cbbb271
mime type release date removal
scottbuscemi Nov 17, 2025
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2 changes: 2 additions & 0 deletions source/releasenotes/2025-11-12-mimetypes-standards-update.md
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Expand Up @@ -4,6 +4,8 @@ published_date: "2025-11-12"
categories: [infrastructure, action-required]
---

_**Update:** This has been deployed to the platform._

Pantheon is updating its platform to align with current IANA standards by removing support for deprecated MIME types that use the x- prefix. This change will be introduced on November 17, 2025.

The following deprecated types have been updated to their modern, IANA-standard equivalents. No action is required for these files unless you have custom code explicitly referencing the old format.
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