Theres no nothing, all my message folders for my gmail just disappeared. The stored messages folder is empty. After update and restart the Thunderbird looked that it re-synchronizes the folders back from the web, but after finished it in turn deleted all the messages again. Gmail also alerts me about an attempt of unauthorized access to my account from an unsecure AP and demands immediate pasword change... This very much looks like one of the most advanced security breach in the Thunderbird history!!! How can I downgrade to previous version? Jan