Comment 9 for bug 509516

i know timesheet works

forgot to say the o2m is located on a page inside a notebook

    <record model="ir.ui.view" id="chricar_top_tenant_form1">
      <field name="name">chricar.top.form1</field>
      <field name="model">chricar.top</field>
      <field name="inherit_id" ref="chricar_top.chricar_top_form"/>
      <field name="arch" type="xml">
        <notebook colspan="4" position="inside">
          <page string="Tenants">
            <field name="tenant_ids" widget="one2many_list" colspan="4" nolabel="1">
              <tree string="Tenant" editable="top">
                <field name="partner_id" />
...snip