Importing from a regular magento 1.7 gives us a TypeError.

[IJOL]

  File "/opt/odoo/run/odoo/connector-magento/connector_magento/models/sale_order/importer.py", line 77, in _rule_paid
    if record['grand_total'] and amount_paid <= 0:
TypeError: unorderable types: str() <= int()

just changed the method:

   def _rule_paid(self, record, method):
        """ Import the order only if it has received a payment, or if there
        is nothing to pay in the first place. """
        amount_paid = float(record.get('payment', {}).get('amount_paid') or 0)
        if record['grand_total'] and amount_paid <= 0:
            raise OrderImportRuleRetry('The order has not been paid.\n'
                                       'The import will be retried later.')

and deleted commit fa27e77, and everything seems to go smoothtly now..