Comment 2 for bug 908189

in sale/sale_sequence.xml

        <record id="seq_sale_order" model="ir.sequence">
            <field name="name">Sales Order</field>
            <field name="code">sale.order</field>
            <field name="prefix">SO</field>
            <field name="padding">3</field>
            <field name="company_id" eval="False"/>
        </record>

it seems this loads without company_id

IMHO all sequences must have a company_id
especially
        'company_id': lambda s,cr,uid,c: s.pool.get('res.company')._company_default_get(cr, uid, 'ir.sequence', context=c),
always creates sequences WITH company_id