Changed package to lightning. Can you please post the output of the following command: apt-cache policy thunderbird lightning-extension sunbird
** Package changed: thunderbird (Ubuntu) => lightning-sunbird (Ubuntu) ** Changed in: lightning-sunbird (Ubuntu) Status: New => Incomplete -- After last Update Calenders and Categories are gone. Unable to create new calendar https://bugs.launchpad.net/bugs/482578 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs