After reading carefully the errors on the "Error console" it seems that the problem was the "Display Contact Photo" extension.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1616004 Title: thunderbird 49.0: No email address on replying Status in thunderbird package in Ubuntu: New Bug description: On replying to an email the sender email address is not transferred to the new email (the TO field is empty) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1616004/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
