1.3.8 to 1.5.1 -- extra manufacturing fields and category fields not saving...

We are updating a heavily modified version of zencart 1.3.8 to 1.5.1. We have managed to get all the modules and plugins working again, with the exception of a few extra fields in the manufacturers_info table and categories_description table...

We have edited the following of the 1.5.1 manufacturers page:

$manufacturers_url_array = $_POST['manufacturers_url'];
          $language_id = $languages[$i]['id'];
          $sql_data_array = array('manufacturers_url' => zen_db_prepare_input($manufacturers_url_array),
		  							'manufacturers_description'	=>	zen_db_prepare_input($_POST['manufacturers_description']),
		  							'manufacturers_products_description'	=>	zen_db_prepare_input($_POST['manufacturers_products_description'])
									);
          if ($action == 'insert') {
           $insert_sql_data = array('manufacturers_id' => $manufacturers_id,
                                     'languages_id' => $language_id);
            $sql_data_array = array_merge($sql_data_array, $insert_sql_data);
            zen_db_perform(TABLE_MANUFACTURERS_INFO, $sql_data_array);
          } elseif ($action == 'save') {
            zen_db_perform(TABLE_MANUFACTURERS_INFO, $sql_data_array, 'update', "manufacturers_id = '" . (int)$manufacturers_id . "' and languages_id = '" . (int)$language_id . "'");
          }

The original fields are saving correctly, and the data from the DB is being put into the new field text area's correctly, but we cannot change the new fields at all. We have changed a few area's to get this working, so if you need another snippet of code let me know. The information is being passed from the form via POST correctly (with the above var names etc)

The code snippet you posted is originally inside a loop for multiple languages, but you didn't include the loop part in your snippet.

In the case of languages, there are sub-elements added for each language, even if you've only got 1 language on the site.

So, you're missing some code:

          $sql_data_array = array('manufacturers_url' => zen_db_prepare_input($manufacturers_url_array[B][$language_id][/B]));

And, your subsequent custom fields have no [$language_id] element selected either, thus suggesting that you might be hacking out multiple-language support in some but not all places. ie ... you're probably also not accommodating that properly later in the file where it loops thru languages to output the input fields.