Comment 8 for bug 845321

A temporary solution would be to tell tomboy that sync is set up directly by setting the respective gconf key:
 - close tomboy
 - Make sure you are logged in into ubuntu one e.G. using ubuntuone-control-panel-gtk
 - start gconf-editor
 - select the key /apps/tomboy/sync/sync_selected_service_addin
 - change it's value to the following word: ubuntuone
 - close gconf-editor
 - start tomboy
 - preferences/sync preferences
 - synchronize now
 - sync Works.
Unfortunately tomboy seems to forget about this once in a while.