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deprecate the rendition:orientation property in EPUB 3.4

Status: Open.

#1646 In w3c/epubcheck;

· iherman opened on Nov 10, 2025

Docker build fails due to missing openjdk image

Status: Open.

#1644 In w3c/epubcheck;

· unknown321 opened on Nov 8, 2025

Command for downloading and extracting of EPUBCheck does not work when used verbatim

status: acceptedReady to be further processedReady to be further processed

type: docsThe issue is related to documentationThe issue is related to documentation

Status: Open.

#1643 In w3c/epubcheck;

· martinpub opened on Oct 28, 2025

Adding AVIF to EPUB 3.4

status: ready for implemThe issue is ready to be implementedThe issue is ready to be implemented

type: specThe issue is related to a Specification updateThe issue is related to a Specification update

Status: Open.

#1642 In w3c/epubcheck;

· iherman opened on Oct 6, 2025

·  

EPUB 3.4

A png when passed thorugh the epubcheck, gets mistaken for JPEG, even tho the magic bytes are correct (when using xxd or hexdump)

status: acceptedReady to be further processedReady to be further processed

type: false-positiveThis issue is about valid content being incorrectly rejectedThis issue is about valid content being incorrectly rejected

Status: Open.

#1641 In w3c/epubcheck;

· Mathusan opened on Oct 2, 2025

·  

Next maintenance release

Context menu item request

priority: lowTo be processed when time allowsTo be processed when time allows

status: in discussionThe issue is being discussed by the development teamThe issue is being discussed by the development team

type: featureThe issue describes a new feature requestThe issue describes a new feature request

Status: Open.

#1639 In w3c/epubcheck;

· GeorgeKerscher opened on Sep 11, 2025

URL normalization of OCF resources

status: in discussionThe issue is being discussed by the development teamThe issue is being discussed by the development team

type: specThe issue is related to a Specification updateThe issue is related to a Specification update

Status: Open.

#1638 In w3c/epubcheck;

· rdeltour opened on Sep 9, 2025

role="doc-pageheader” fails to validate

status: in discussionThe issue is being discussed by the development teamThe issue is being discussed by the development team

type: specThe issue is related to a Specification updateThe issue is related to a Specification update

Status: Open.

#1619 In w3c/epubcheck;

· Lululalu opened on Jul 23, 2025

·  

Next maintenance release

Allow Internationalization Tag Set attribute in EPUB

spec: EPUB 3.xImpacting the support of EPUB 3.x specificationsImpacting the support of EPUB 3.x specifications

status: ready for implemThe issue is ready to be implementedThe issue is ready to be implemented

type: specThe issue is related to a Specification updateThe issue is related to a Specification update

Status: Open.

#1616 In w3c/epubcheck;

· iherman opened on Jun 2, 2025

·  

EPUB 3.4

Some Messages Codes are missing in the online documentation

status: acceptedReady to be further processedReady to be further processed

type: docsThe issue is related to documentationThe issue is related to documentation

Status: Open.

#1613 In w3c/epubcheck;

· kantoche opened on May 29, 2025

JSON Output for OPF-015 Seems to Be Missing Location Entries

Status: Open.

#1611 In w3c/epubcheck;

· pjkaufman opened on May 15, 2025

Check for multiple occurence of OPF guide references with type="text"

priority: lowTo be processed when time allowsTo be processed when time allows

status: needs reviewNeeds to be reviewed by a team member before further processingNeeds to be reviewed by a team member before further processing

type: improvementThe issue suggests an improvement of an existing featureThe issue suggests an improvement of an existing feature

Status: Open.

#1609 In w3c/epubcheck;

· mkraetke opened on May 6, 2025