The workaround suggested in (https://bugzilla.mozilla.org/show_bug.cgi?id=373167#c23) seems to work for me.
Summary: Replace port 389 with port 3268 in the directory settings. ** Bug watch added: Mozilla Bugzilla #373167 https://bugzilla.mozilla.org/show_bug.cgi?id=373167 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/320057 Title: Thunderbird hangs for 10secs when auto-completing address To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/320057/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
