CouchDB 0.9.0 packages in repositories now, version 0.9.0 contains backwards incompatible changes.
F-9: https://admin.fedoraproject.org/updates/couchdb-0.9.0-1.fc9
F-10: https://admin.fedoraproject.org/updates/couchdb-0.9.0-1.fc10
F-11: https://admin.fedoraproject.org/updates/couchdb-0.9.0-1.fc11