It might well be temporary as there are 135 changes since yesterday for me so things might not have caught up yet, but worth checking on any upgrading you're doing.
For kdegraphics-mobipocket, libqmobipocket2 has to move from 21.12.3-1 to 22.12.0-2 to be installable again.
Thanks, devil. It's only kdegraphics-mobipocket now and kget is being updated.
dpkg -s kdegraphics-thumbnailers tells me:
----------------------------------------cut here ---------------------------------------
Package: kdegraphics-thumbnailers
Status: install ok installed
Priority: optional
Section: kde
Installed-Size: 168
Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Architecture: amd64
Version: 4:22.12.0-1
-----------------------------------------------
Replaces: kdegraphics-mobipocket (<< 4:21.12.3)
-----------------------------------------------
Depends: kio, libc6 (>= 2.15), libkf5archive5 (>= 5.90.0~), libkf5kdcraw5 (>= 4.12.3), libkf5kexiv2-15.0.0 (>= 4.5.90), libkf5kiowidgets5 (>= 5.90.0~), libqmobipocket2 (>= 4:16.12.0), libqt5core5a (>= 5.15.2~), libqt5gui5 (
>= 5.15.2~) | libqt5gui5-gles (>= 5.15.2~), libstdc++6 (>= 5)
Recommends: ghostscript
Breaks: kdegraphics-mobipocket (<< 4:21.12.3)
Description: graphics file format thumbnailers for KDE SC
These plugins allow KDE software to create thumbnails for several
advanced graphic file formats (PS, RAW).
.
This package is part of the KDE graphics module.
Homepage: https://invent.kde.org/graphics/kdegraphics-thumbnailers
--------------------------------- cut here ----------------------------------------
And as far as I can tell kdegraphics-mobipocket is no longer part of Debian sid.
The latest version 4:21.12.3-1 from bookworm (testing) is not compatible
with the current sid version 4:22.12.0-2 of libqmobipocket. (https://packages.debian.org/sid/libqmobipocket2)
Good to know. Thanks, Teriarch.