ho risolto modificando il CSS publich_html\components\com_sobi2\includes\com_sobi2.css!
non so perchè quel campo (evidenziato in rosso) non era compreso nell'elenco:
/* Styles for the fields */
/* Add style for each field you added in the form span.sobi2Listing_field_yourname */
span.sobi2Listing_field_street,
span.sobi2Listing_field_postcode,
span.sobi2Listing_field_county,
span.sobi2Listing_field_country,
span.sobi2Listing_field_email,
span.sobi2Listing_field_contact_person,
span.sobi2Listing_field_phone,
span.sobi2Listing_field_fax,
span.sobi2Listing_field_city,
span.sobi2Listing_field_hotline,
span.sobi2Listing_field_phone,
span.sobi2Listing_field_federal_state,
span.sobi2Listing_field_longitude_label {
padding-left: 10px;
}
mha...