Actually according to https://phab.lubuntu.me/w/bugs/ it looks like Lubuntu just tracks bugs via Ubuntu itself.
affects ubuntu/calibre status new tag lubuntu ** Also affects: calibre (Ubuntu) Importance: Undecided Status: New ** No longer affects: calibre -- You received this bug notification because you are a member of Edubuntu Bugsquad, which is subscribed to calibre in Ubuntu. https://bugs.launchpad.net/bugs/1884525 Title: Cannot start calibre To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/calibre/+bug/1884525/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~edubuntu-bugs Post to : edubuntu-bugs@lists.launchpad.net Unsubscribe : https://launchpad.net/~edubuntu-bugs More help : https://help.launchpad.net/ListHelp