It seems like this is the issue. I have to say it is partially working. For example, sometimes it undoes an operation performed a few moves ago.
-- Thunderbird fails to perform undo operations correctly https://bugs.launchpad.net/bugs/274647 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
