Lots of those aren't actual filetypes and are probably being included because they are just text/plain, which is a valid ebook format.
None of this actually matters, though. It's not really calibre's fault that it allows itself to be a right-click option to open with. For all of Linux's many excellent advantages, and even despite Linux's vastly superior desktop database for handling *allowed* mimetype associations, the actual defaults system is frankly abominable. Any mimetype that doesn't have an explicit default set is considered "unspecified default" and the specification says that your Desktop Environment is allowed to choose which program to open your file in by picking it out of a hat. In practice what happens is that they use the first one listed in the system cache. This cache is randomly generated and simply installing a program which doesn't even handle text files, will regenerate the entire cache from scratch, and shuffle the order, thus changing which program actually opens text files. So every time you check, you might see a ***different*** default application. There's no way to win against this, other than by manually using "set as default". The problem is not limited to calibre. For great joy, try installing a program such as Anjuta which declares itself capable of opening inode/directory, at which point your system may arbitrarily decide to cause things like plugging in a hard drive or USB flash drive to launch that program instead of your file browser. status invalid -- 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/1960822 Title: Calibre (Ubuntu) sets itself as standard-app for a lot of file types not related to it To manage notifications about this bug go to: https://bugs.launchpad.net/calibre/+bug/1960822/+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
