yes it does happen with the gmail backend at least, I just started thunderbird from terminal and it gave this error if it helps (I also have attached a screenshot of the notification alert)
(thunderbird-bin:4468): libebook-WARNING **: e_book_client_new: Cannot get book from factory: Invalid source ** Attachment added: "Screenshot at 2011-10-10 22:36:11.png" https://bugs.launchpad.net/ubuntu/+source/couchdb/+bug/825280/+attachment/2535769/+files/Screenshot%20at%202011-10-10%2022%3A36%3A11.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/825280 Title: Repeated Ubuntu One address book errors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/couchdb/+bug/825280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs