Comment 15 for bug 563893

As others my configuration files were completely wiped out in the amd64 version. Also symlink is created each time Thunderbird is started: .mozilla-thunderbird -> /home/user/.thunderbird

A .thunderbird.upstream sub-directory never appeared in the home directory.

This is quite bad form, even if it is a beta, since recovery seems almost impossible. Perhaps Thunderbird needs an auto-backup for the configuration files.