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Reject critical chunks in APNG frame-data sequences - #903

Status: Open.

#579 In w3c/png;

· svgeesus opened on Aug 19, 2026

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4th edition

Latest version of SMPTE ST 2067-21

Status: Open.

#576 In w3c/png;

· svgeesus opened on Jul 23, 2026

Unclear tIME restrictions

Status: Open.

#572 In w3c/png;

· Oondanomala opened on Jun 20, 2026

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4th edition

Improve section 7.2 Scanlines

documentationImprovements or additions to documentationImprovements or additions to documentation

needs resolved discussion

Status: Open.

#552 In w3c/png;

· ghost opened on Dec 30, 2025

Browsers are not handling BT.2020 images correctly

implementations

Status: Open.

Bug

#538 In w3c/png;

· svgeesus opened on Sep 5, 2025

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3rd edition

5th edition meta-issue

Status: Open.

#537 In w3c/png;

· ProgramMax opened on Sep 3, 2025

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5th edition

4th edition meta-issue

Status: Open.

#536 In w3c/png;

· ProgramMax opened on Sep 3, 2025

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4th edition

Filter suggestion improvement

documentationImprovements or additions to documentationImprovements or additions to documentation

Status: Open.

#505 In w3c/png;

· ProgramMax opened on Feb 21, 2025

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Future edition considerations

Add iEId chunk

needs resolved discussion

Status: Open.

Feature

#495 In w3c/png;

· ProgramMax opened on Jan 29, 2025

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Future edition considerations

Add iEXt chunk

needs resolved discussion

Status: Open.

Feature

#494 In w3c/png;

· ProgramMax opened on Jan 29, 2025

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Future edition considerations

Adding generic image-type data chunk(s)

needs resolved discussion

Status: Open.

Feature

#493 In w3c/png;

· ProgramMax opened on Jan 29, 2025

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Future edition considerations

Join chunk ordering rules

Status: Open.

#467 In w3c/png;

· ProgramMax opened on Sep 28, 2024

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Future edition considerations