I had the same problem. I went into Advanced Desktop Settings > Window Management > Extra WM Actions and turned the "Toggle Fullscreen" option on, assinging it to Alt-F11. I then simply pushed Alt-F11 while Thunderbird was highlighted and everything was fine.
-- Thunderbird starts in a full-screen mode and cannot be restored https://bugs.launchpad.net/bugs/196058 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