At some point, the package was silently switched to a Python3 compatible fork that changed the bookmark format from Pickle to JSON: https://github.com/multiSnow/mcomix3 - this apparently deleted the Pickle file after converting it to JSON. Recently, it was switched back to the original upstream that knows nothing about JSON bookmarks: https://gitweb.gentoo.org/repo/gentoo.git/commit/media-gfx/mcomix?id=16e61335682f168c215504e4fe4e7090397fc4f1 Now all bookmarks are gone from the program's interface, but they're still on disk, at "~/.local/share/mcomix/bookmarks.json", being completely ignored by this new mcomix version, which creates its own, empty, "bookmarks.pickle" file instead. Reproducible: Always