I am having the exact same problem except I am using Kubuntu 12.04 & thunderbird 13.0.. I can select all my contacts the the personal address book and drag and drop then on ubuntu one address book but nothing gets copied.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/897180 Title: Cant' add contacts to Ubuntu One address book in Thunderbird Kubuntu 11.10 Status in “thunderbird” package in Ubuntu: Confirmed Bug description: Installed Ubuntu One contacts support for Thunderbird in Kubuntu 11.10 as specified in https://one.ubuntu.com/help/tutorial/install-and- setup-contacts-sync/. When I try to copy or move one or more contacts by drag-and-drop from some address book (personal one, for instance) to Ubuntu One address book the 'drop' is rejected and the contacts are not copied. Adding a new contact directly to Ubuntu One address book (right click, new contact) creates a new contact but adds it to the personal address book instead of U1 address book. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/897180/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

