In some installations of hebrew language files for virtuemart 2.0.x there are misssing some frontend labels which are shown by opc at the frontend. Therefore you may need to add the labels into the language overrides as shown here:
the labels are:
used at the top basket's shipping section:
COM_VIRTUEMART_ORDER_PRINT_SHIPPING
used at the botttom:
COM_VIRTUEMART_ORDER_PRINT_SHIPPING_PRICE_LBL
best regards,
stan