I'm also having this problem.
I opened CouchDB web interface; deleted the contacts database and re-added. Also set delayed_commit to FALSE.
xdg-open file:///home/david/.local/share/desktop-couch/couchdb.html
This seemed to cure the problem except that if I logged into UbuntuOne I could see that the contacts were not being updated.
When I rebooted the machine the contacts were restored from UbuntuOne and I regained the three empty contacts at the start of the list.
After this I was back to the same situation - attempts to delete or modify contacts results in "Other Error"
Best Regards
I'm also having this problem.
I opened CouchDB web interface; deleted the contacts database and re-added. Also set delayed_commit to FALSE.
xdg-open file:// /home/david/ .local/ share/desktop- couch/couchdb. html
This seemed to cure the problem except that if I logged into UbuntuOne I could see that the contacts were not being updated.
When I rebooted the machine the contacts were restored from UbuntuOne and I regained the three empty contacts at the start of the list.
After this I was back to the same situation - attempts to delete or modify contacts results in "Other Error"
Best Regards