An example is in kio-extras. From https://invent.kde.org/kde-linux/kde-linux-packages/-/jobs/3387301/raw: 2025-09-21T15:24:42.884282Z 01O FAILED: po/it/docs/kioworker6/bzip2/index.cache.bz2 /builds/kde-linux/kde-linux-packages/pkgbuilds/kde-banana-kio-extras-git/src/build/po/it/docs/kioworker6/bzip2/index.cache.bz2 2025-09-21T15:24:42.884284Z 01O cd /builds/kde-linux/kde-linux-packages/pkgbuilds/kde-banana-kio-extras-git/src/kio-extras && /usr/bin/meinproc6 --check --cache /builds/kde-linux/kde-linux-packages/pkgbuilds/kde-banana-kio-extras-git/src/build/po/it/docs/kioworker6/bzip2/index.cache.bz2 po/it/docs/kioworker6/bzip2/index.docbook 2025-09-21T15:24:42.884286Z 01O index.docbook:45: validity error : standalone: normalization of attribute role on literal by external subset declaration 2025-09-21T15:24:42.884287Z 01O >Facendo clic su un file compresso con estensione <literal role="extension " 2025-09-21T15:24:42.884288Z 01O ^ 2025-09-21T15:24:42.928006Z 01O [352/589] Generating po/gl/docs/kioworker6/tar/index.cache.bz2 This is caused by a change in Libxml 2.15.0, which became more strict: https://gitlab.gnome.org/GNOME/libxml2/-/commit/e4cbc295fa97f3c290cec8b243bd96ebdaa3dab2. Arch just rolled out Libxml 2.15.0, so Arch users are now seeing this issue. But we don't have an Arch-based CI, so it's not seen there.
Most issues should be fixed now by Luigi, eg. https://websvn.kde.org/?revision=1718680&view=revision for kio-extras