Fedora 21: thunderbird Security Update 2015-11598 Update to latest upstream version, see following page for changes: https://www.mozilla.org/en-US/thunderbird/38.1.0/releasenotes/ This update also should fixed problems with thunderbird-lightning-gdata package. Rebase to Thunderbird 38. By this release thunderbird-lightning (calendar) package has become obsolete, because it is a part of Thunderbird…