lp bug: https://launchpad.net/bugs/311981 fixed lp bug: https://launchpad.net/bugs/314575 fixed bzr revid: stephane@tinyerp.com-20090123121404-345vxufyn1beqjt4
lp bug: https://launchpad.net/bugs/311981 fixed bzr revid: stephane@tinyerp.com-20081229102859-bgxe0btq1d315a6m